Yeah, although it's not something you can push in modern MMORPGs. Players get too used to a relatively tight numerical balance, and "being able to play whatever you want".

But if you had older types of balance, where pure jobs could easily deal 50%-100% more damage than others, while certain support jobs like CCers were flat out a requirement to handle many dungeons, that'd be too annoying. Even if it makes for far better and more interesting class and fight design.

Look at bolt casters in DAoC flat out killing people before they even knew they were being attacked. Was that fair for the person being killed? No of course not. Was it actually quite balanced overall and led to a specific niche? Yes, quite so.