"I don't want to think while I play, so no one should be allowed to."

[Fawkes]

and not all jobs need to be needlessly simple for the sake of it

besides, a not-insignificant subset of the playerbase isnt casual. the vast majority isnt 100%, so why should 100% of the jobs cater to them?

It's all or nothing, otherwise players would categorize them as raid and non-raid jobs and SE wants every job to be invited to content. Or, if a job was just harder to play for no benefit then people would avoid that job and SE also wants to prevent that.