This is a bit of a strawman argument, F.lux is not in this category of silly apps. F.lux is a reasonable app it has a good track record respecting its users and is requested by many many users. It is about control.

Wait! What do you mean "breaks" w.r.t. f.lux?

How does f.lux cause any breaks? What has Apple ever had to fix with f.lux sideload installed iPhones?

And what if I, the owner of the device, sign-off on the risks? If they have an EULA that covers such things, then why worry?

Think about the cost to Apple's support teams after grandma is having problems with her phone being yellow. Her grandson definitely was not messing with her phone, at all...

so by the same logic, iOS should only be available in one language and should not allow deletion of any data, ever?