An iPhone 14 plus barely fits 100% in some tighter pockets on jeans/trousers and gives significant restriction in movement and comfort. YMMV.
Mens' clothes have adapted significantly over the past 15 years to accommodate growing devices - it's just happened slowly enough that it's hard to notice.
Modern jeans are made with deeper front pockets; and a lot of sportswear has added/redesigned pockets. I have running clothes from 20 years ago with nothing but a space for some keys, and others with only shallow pockets with no button or zip - hardly suitable for carrying a $1000 phone! Modern running clothes often add a large, zipped, sweat-proof pocket specifically designed for carrying a phone.
People's experience of this will vary with their style preferences, naturally - nothing modern exceeds the pockets on a 1990s pair of cargo pants or JCNO jeans! And if you update your clothes regularly, your entire wardrobe might have gained large pockets without you noticing.
Yes, never understood them either. It's no issue to sit with a phone and wallet in the pocket/backpockets. This is more of a The Princess and the Pea-style issue than a real problem....
My iphone 7 fits ok-ish in my front pokets if I stand but I have to adjust it and pull it down when I want to sit. It's the main reason why I was looking at the 13 mini as opposed to the regular.
As for a coat/suit jacket I can always tell when someone has a large phone in their suit jacket pocket. If you care about that sort of thing it really ruins the line and drape of the jacket.
Because Apple didn't upgrade the CPU in the non-pro this year the iPhone 13 Pro is still the better device.
Supply might be good for now but there's consequences in the near term.