A profile isn't going to do that it'll let any call through.
That's not true at all. With a BlackBerry, you can create a profile only to ring if a contact in your phone book is calling, only if a specific sub-set of contacts is calling, etc.
I don't think it is a silly thing to get mad about. Well, yes I do, but I think anything about a phone is silly to get mad about. In the end, it's just a phone. Nonetheless, profiles is a feature than Nokia and Motorola dumbphones have had in one form or another since 2002 or earlier.
If Apple wanted to go simple first, they could easily have an option to disable or enable profiles. Persons that didn't care could leave it off and those that wanted it could enable it and customize it accordingly.
It's a legit suggestion/question from the OP. But I guess since it isn't something Apple saw fit to include from the start, it is obviously not important.