I am pretty confident that Apple chose special security screws specifically to prevent users from opening their phones at home for a lark. The last thing they want is a user bringing in a device that has been damaged due to a broken seal, caused by a curious kid who found the Torx driver set at home.
This is just defending anti-R2R. It's more costly to buy and swap different screwdrivers for all the Apple repair, manufacturing centres, etc. Apple doesn't care about customers opening up their devices - they'll outright reject the claim. This is a bad take.
Of course they do. Apple is constantly putting more guard rails around their devices. When uninformed users mess up their devices they make a public stink about it and damage Apple’s reputation. Apple does not want this. This is the entire reason behind all the gatekeeper stuff in macOS.
What Apple does not care about is power users who want to crack open their devices and void the warranty. Those users can go out of their way to buy security screwdrivers. Apple has always done this, going at least as far back as the original Macintosh.