By that reasoning everything in Windows is obvious since 90% of the other computers on the planet run Windows. So why not just stick with Windows and stop complaining that things work differently on non-Windows computers.
That logic is perfectly sound. When something becomes ubiquitous it certainly does become the obvious thing to everybody. That's why in modern times it's more obvious for people to toast bread in a toaster and not in a frying pan like they might have done in the past.
Aside from that - explicitly having both Backspace and Delete is also obviously better than having only one of them and hiding the other beneath a multi-key shortcut.
You mistook pointing out a flaw for complaining though. I'm not complaining since I'm not stuck on a Mac. I keep one around for doing iOS things and for helping Mac users figure out how to do things.
Personally, I prefer to use a Linux desktop system that draws deeply from the Windows UI and currently that is Manjaro with XFCE. With that I get the best parts of Windows, I can customize it to do just about anything I want and it's even more stable than Mac or Windows.
