Exactly. Most folks keep a phone 2 years. Other issues crerp in long before battery issues...older operating systems, storage and memory issues, physical damage....etc...Do whatever you want with the phone and charging. Phone is there to serve you not the other way around.
Batteries seem to last fine on iPhones depending on how much used. Daughters last about 3 years(charged 2 times a day) wife’s iPhone XR at 80% capacity after 5 years.
My iPhone 14 Pro at 91% after 1 year of heavy usage. I high speed charge daily once.