because people refuse to try another way.
Yup, follow the guide that pertains to the content or else it's impossible. It's disappointing.

SE need to make a way where you define your character as that "job" is what i'am.
I would like to. If I could I would remove the ability to cross-class entirely and just play Summoner... I want to dedicate myself to that, I want to go above and beyond so I'm better than those people that don't care about it and have it as an off-job... but, can't really do that right now.