Well, let's break up the circlejerk a little, shall we? You'd only force that bard job stone in my hands over my cold dead body. Archer is the bow job I always loved and I'm not trading it for some "we got real sad so we started playing music on our bowstrings" weirdness.
Now, to adress the practical concerns. Being bad at the game and having your team carry you isn't a bannable offense. Actually it's exactly the opposite - Yoshida himself admits that they design casual content in a way where a couple good players can carry the rest. I can do the carrying and have done so many times. But sometimes it's nice to kick back and relax. I'm yet to be in an Alliance Raid where I was the lowest DPS on Archer. If we were to genuinely start banning players who are bad, we'd run out of population very soon.
Classes are too deeply engrained into the basis of the game that their removal would be a difficult and pointless task. Again, Yoshida stated as much himself.
In the content where it does matter - what SE considers High-End content - you actually can't bring classes. Real shame btw, I'd love to see how confused fflogs would be with an archer log. But I digress. We can conclude that SE does have ability to limit duties to "Jobs of Disciples of War/Magic". Allowing classes into casual content is intentional. Deal with it.
