Designing devices so they don’t need repair before they become obsolete is very important, and I’m glad Apple thinks that way.
But that doesn’t remove the need for repairability because things still break. Screens get cracked by impacts, water ingress happens, and batteries do fail for reasons other than usage patterns (e.g. frequently used on a hot car’s dashboard). So there should still be a relatively easy way to replace the most commonly-replaced parts (screens and batteries).
Once upon a time, all phone batteries were easily replaceable, because they couldn’t keep the phone running for a whole day of usage. You may remember people buying spare batteries, kept charged by a standalone device, so they could quickly be swapped with the one in the phone when that one died. This was common in the days of the first-generation smart phones, and the feature phones before then.
I realize that you can’t have waterproofing if battery access can be had by just pulling off a plastic rear cover, but there should still be options. For example, I’ve seen calculators where the back is screwed on, with a rubber gasket around the perimeter - providing water ingress protection and easy removal. I see no technical reason why Apple (and Samsung and Motorola and LG and all the rest) couldn’t do something like this.