machinist main crashing out

[Aravell]

I always thought "You can beat the raid with any job" so there be no point.

This is actually true, you can beat the raid on any job (usually), but some jobs offer so little that they reduce the leeway for mistakes so much that it becomes a detriment to take any average player of that particular job.

Like in the Abyssos tier where taking a WAR/PLD actually made the dps checks harder, so locking them out was an overall benefit to the party.