Why most iPhone cases have holes around buttons and lanyard?

[hajime]

Hello, I have checked many case for iPhone 15 Pro Max but I cannot find one that is satisfactory. There is no perfect case. Each has its own problem(s). I cannot understand why manufacturers created holes around buttons and 1-2 holes for lanyard to allow foreign particles to enter the cases to scratch the phones. Some even made a big hole in the middle of the case to make their super-defensive cases vulnerable. Anybody knows why they are doing this?

 

[Slartibart]

I might miss something, but there are plenty of cases which have only the "required" cut outs: speakers, charging/data cable, camera. Their form is basically like this one.

 

[RRC]

Different cases for different tastes.

Some prefer open bottom, some prefer closed.
Some prefer metal buttons and camera ring, some prefer cut outs and flush buttons.

There's no "correct" case.