We should just purchase what we want and can, within reason, of course. If 16 GB is sufficient, people often make it sound like going for 32 is criminal. It is not. It is a choice. The ones who make it are the ones who pay for the choice and end up with a lighter wallet. That's the cost of their choices. No harm done.
I know 16 GB is going to be sufficient for me. I went with 32 GB because I wanted the M1 Max GPU cores. At that point, going for the top config in stock made more sense. I did not need 1 TB. I have been using 256 GB since 2013 and that, too, 150 GB free more or less, at all times. Store most of my data on external drives, and only the 'running data' is what stays on the laptop.
That happened because of the 256 GB drive. The 1 TB now offers me more leeway. Did I need it? No. But, will certainly appreciate and use it. That is all tools are about. You can have the bare minimum screwdriver do the job, and then you can have an assisted screwdriver, or a screwdriver with a better grip and handle. It's just about choices.