The thing is, I’m trading it in to Apple. They’re going to swap out the battery anyway, to sell it or use it as a warranty replacement phone.You paid paid for it so use it how you want, but do people not think about the 2nd, 3rd, 4th owner of phones? Even though you only keep it a year or 2, it will likely be resold to another user. If the original owner makes a very small effort to preserve the battery, then the next owner (or the reseller) won't have to replace the battery. So in the long term fewer batteries need to be produced.
Personally I've been trying to limit my charging for years using a smart switch that only charges my phone for 1 hour per night. My launch day 13 pro still has 93% battery health with heavy usage.
If I were still selling my phones privately, or handing them down to family, it would make more sense to preserve battery health as much as possible.