Earlier quoted context omitted.
1. People in my household put their phone to charge only once a day, when they go to bed. How hard is it to plug a phone once a day?
Then people in your household either (a) don't really use their phones that much or (b) get brand new phones with brand new batteries every year. There is no phone battery that lasts an entire day for a person that uses their >1yo phone a lot throughout the day.
Do you use battery saver mode? I actually try not to fully charge my phone, but keep it between 30%-70%, which puts less strain on it, and battery saver kicks on at 50%.