“Being able to play every content in FFXIV with this specific class” then let me officially withdraw that statement.
I really apologize.

Gatherer class has abilities where gatherers can only gather,
Crafters class has abilities where crafters can only make,
And battle class has abilities where battle class can only fight.
They are prepared individually
finally yoshida is correcting the horrible system tanaka tried to push on this game. THANK GOD.