Then it wouldn't have been protect. Literally, in other iterations of Final Fantasy, protect increases your resistance to physical attacks. What you guys are speaking about is a nullification of physical attacks. They are not one in the same.

S'like saying death and knocked out are the same. They're not.

Also, I'd really hate to see passives like have X amount of jobs leveled, gain X amount of increased damage dealt. Or any other kind of buff. I like how this game offers 1 character can play everything, but by no means should it be forced. Let's face it, if you plan to raid, you would be forced to do it.