It’s true that what many of us (including myself ) do toward our batteries may understandably be called “obsessing.” However it’s also true that a certain amount of care, monitoring, awareness of battery state is useful for people who do not upgrade yearly. Monitoring battery on iphones (and Macbooks when they were replaceable, ahh the good old days) has been a custom for me since many years ago, given the tendency for batteries to deteriorate, sometimes way too early (within 1-2 years). Actually that’s true for Airpods too, yet another example that even though we can’t monitor or set percentages for their battery health, we understandably hope to not have to replace them due to battery within 2 years of purchase, as I had to do this Jan. 2022 for example with getting another set of $280 airpods. Do I consider it ”obsessing”? Not sure, it’s a fine line. It’s good to not worry about such things and enjoy the device, but it’s also very good in my view to at minimum, log the purchase date of items to monitor how soon (at times) the battery can crap out.
Just my opinion, and limited experience, of course!
I’d agree with OP that would be nice if we had even more control, as described, but I’m also content with what is available for my many e-devices such as the 80% option noted above, not to mention Coconut Battery for Mac users.