The most frustrating thing about this is that it was entirely predictable, and is a problem that was already solved elsewhere in the game.

It was entirely predictable because back in Heavensward, this was Crystal Tower in a nutshell. If you didn't do it in ARR, it rapidly became nearly impossible to do it. Reddit and such would try to organize nights when people would queue so that it would actually pop, because otherwise it just didn't. It was old news for most players and there was no reason to do it again. How did they fix it: Alliance Roulette came into existence. It's the literal point of roulettes: give players done with content a reason to run it again via rewards so that newbies can complete it.

Why they forgot this with Bozja (and BA, although that seems easier to get groups for these days) baffles me, but here we are. Putting instant content inside other instance content that requires a lot of people is a plan that can only work either when lots of people want to do it (early on in the lifespan), or when you have external coordination making times for it (Aether has a Bozja/BA Discord for this exact purpose). Yet it's pretty absurd to say "go join this Discord in order to complete story content in the game".

If these large scale instances were in the duty finder with a roulette instead of making people sit in a zone for an hour to try to get them to pop when those players have no reason to be there, you'd see this problem go away real fast. The design of Bozja just seems to deliberately forget what SE used to know about this stuff and it's utterly baffling.