This is an “unpleasable customer” problem. When the 13 Pro was current, everyone was yelling at Apple that it was too thin and that they wanted a slightly thicker phone with more battery life, which is what Apple did.
Not really. The iPhone 13 Pro non-Max was fine. If people want bigger, they can get a Max phablet. It's the 6 and 6 Plus especially that had a bendgate. They're trying too hard to make them too thin, sometimes. I'd be fine with a 5-7 mm thicker. Apple should do what's it's best at... not listening to frivolous criticism.