You think it’s a waste of time and money to use a slow charger. But you don’t think it’s a waste of time or money to:
1. Schedule a service appointment
2. Drive to the store
3. Wait around for them to replace your battery
4. Pay for this service (or get it “free“… by *paying* for applecare, an extended warranty you pay for even if you never use it)
5. Drive back home
6. Have a phone that’s been cracked open by a counter jockey (potentially decreasing water resistance)
Want to know how much time it took me to do this on my 11 pro last week, including getting my screen changed and 2 trips back and forth to the Apple Store???
90 minutes.
How many times a year do you charge your phone? How much faster does it charge at 18/20/30W? If you save 3 hours a week of charging time(which is a SUPER low number), but lets use actual working time and say you loose 1 hour, heck 30 minutes a week of time you could be earning money(being late to work, whatever). That's 26 hours a year. At minimum wage (which who can actually survive on that and afford one of these phones) that's $188/year which would cover anyones lost time and cost to replace a battery by more than double. (AppleCare costs less than that a year btw)
If we start talking livable wages in a modern world, the time you save over a year(even if it took you 4-5 hours to get your battery replaced) to fast charge your phone, WHICH THEY ARE DESIGNED TO DO, is way more than the personal cost associated with slow charging.
Time is precious, but feel free to use yours charging your phone. (I've just spent mine ranting on a forum to rando's on the internet)