Don't fall for the 'glue cuz of protection' myth - there are and had been water-resistant phones way before Apple started glueing to avoid customers doing their own repairs and them losing out on new sales.
I've seen rumors that Apple started waterproofing phones after Chinese criminal groups started farming parts on AppleCare by dumping the mainboard into buckets of Shenzhen seawater to deny electronic serial number readout. Your logic board can't be so dead from normal use that not even its PMIC respond to commands if it's waterproof.
I've also had iPhone dying from gasket leaks, the circumferential double sided tape seal dries out after a while.
Re the repairs, I can get the battery swapped on the 13 mini for £49 which isn't that bad. (iSmash, not Apple).
Also important to note that post is 1 datapoint. My "waterproof" phone fell in the bath for about 2 seconds and broke...
And they weren't bulky tactical phones that looked like the smartphone equivalent of Humvees?
Which phones? I ask as someone that's had to replace multiple phones after a trip through the washing machine.
Modern phone water resistance is incredible. I've even seen people literally swim with their phones and not even question if it was a bad idea.