Hey man, we don’t know each other and shouldn’t get upset over a phone. Most people upgrade every 1-2 years and/or slap a case on their phones, so as you stated it doesn’t really matter what material the back is made of, since even if it cracks most people won’t have to look at it and their phone will probably work just fine anyway.
Apple has for a very long time now prioritized materials that are highly recyclable, feel good in the hand and look good. Traditionally, that’s glass and metal. That’s what you get with iPhones, and it hasn’t changed since they were first introduced with glass backs in 2017.
I didn’t say cracking your phone is a you thing, just that you seem by your own admission to crack phones a lot. If that’s true, then you should consider a case regardless of the phone you get or what material it’s made of.
My god, any disagreement on the internet anymore is immediately interpreted as a personal attack. Use the phone you want to use, smh.