I'm taking a 3rd job up in fates now and literally every party I have been in has at least 4 tanks.

I mean that. The makeup is usually 4-5 tanks and at least 2 healers, I've gone all the way up to 39 now and I've seen it nearly every party.

People got their first or 2nd jobs, their favorite to 50, and now have realized its handy to bandwagon onto PLD, WHM, SCH. So they're raising them.