Now this is going to show just how much I
don't know about film

I thought film would have a particular white balance in which it would be best used. So the smart photographer would use film that was made to be used in the golden hour(s) at the golden hours, and the processing guy would take note of this and adjust his chemicals accordingly. Or am I just being really naive here?....
Alex
Yes and no. Colour film typically comes in daylight balanced and tungsten balanced variants. Tungsten balanced film might be very hard to find now. Frequently photographers would use filters (blue to counteract tungsten light, magenta to counteract fluorescent light colour casts) on the front of the lens and/or flash to white balance a scene. That was about it though, no custom white balance, or pre-sets for many common scenarios.
....
Padaung's response is worth reading. I'm going to simply expand on some of what they have written. Everything we have written so far is assuming colour negative film. Black and White film can be tweaked for each roll, and for different conditions.. but you are paying someone technician rates for a couple of hours, plus materials. Much much cheaper to learn how to do it yourself.
Colour film comes, with the Tungsten exception, optimized for "white light" (each manufacturer tweaking their own optimization). Problem is... "white light" is the exception. Simplistically speaking "Daylight" is "white" at noon on a clear day. At all other times of the day, the light is changing colour. It is different at 8am, different again at 10am, 2pm, 4pm, etc. Changing where you are in the world changes the colour, even at noon on a clear day. The weather tomorrow will change the colour of the light today - especially at sunset and sunrise ... even on a clear-ish day.
All of this on a clear day. How often do you shoot on a totally clear day? Clouds turn the light blue, as do shadows. Standing near a large tree turns the light greenish. Etc etc etc
A photo lab does not tweak it's chemicals. They are kept at particular temperatures (within fractions of degree) and dilutions ... and everybody's film gets processed that way. How they colour correct is by changing the colour of the light that shines through the negative and exposes the paper. In the old days this was physically a coloured filter... now I think they change the colour of the bulb directly.
Colour negative film has a reddish base when processed. Each manufacturer's reddish base was a different shade of red. Even films by the same maker, but different families, would have a different colour base.
There were manuals (and later presets) so that the technician could tell the machine what the film was, and the appropriate filter was used to counteract the colour of the base when printing. If this was the only adjustment made then the prints would be made as if each and every exposure was made at noon on a clear day, with film that was about half-way to its expiry date. Or fresh film. Or old film. Oh.. did I mention that film changes its base colour as it ages? So, Kodak's consumer film would not be fully colour balanced until it was about a year or so old, since Kodak determined that the average consumer would leave their film in the camera for about a year or so. However, their professional grade films were colour correct the day after they were made since most professionals keep their film for a few weeks at most, and if they stocked up on film they tended to refrigerate or freeze their film to halt the aging process.
So, after the initial settings to (more or less) counteract the film base red the technician may or may not look at each image to see if further colour corrections needed to made. Most images of normal scenes are easy to colour correct... and in fact computers can analyze a scene and get it pretty close now-a-days. Well, at least 'pleasing'. A computer or a technician can recognize and colour correct a tree or a face to make it look natural. But if may not be correct. The face may not be skin coloured in reality for instance.
As humans, we don't see all of these colour shifts during the day. Well, actually, we do... but the brain filters itself to make us believe that all bright lights are "white". They ain't.
I think I said it in this thread. If you want to be surprised, shoot slide film, and project the slides in a proper viewing environment. Since you don't typically print from slides, it captures the colours that were really there. Shoot the same thing during a clear day every couple of hours from morning to night. Shoot some inside shots with the outside visible in the window during different times of the day. Do the same thing under different types of sky (hazy, cloudy, clear). It's important to shoot the same thing (or type of thing) under different conditions so you can compare them. Shoot something that is part in the sun and part in deep shadow. This exercise will teach you more than anyway can tell you. You have got to do (and see) this for yourself. Trust me... if you are going to get a film camera, do this exercise early on.