such systems exist in elite, just the material sucking isnt modelled. if you see stars dominating the sky, but you cant find them within a few 100ly, because they are in fact 1000s of ly away you can be sure there must be a reason for it to overshine everything else.
example:
the group of bright stars nearly all include a black hole or are made up by up to 15 stars in 1 system.
You should remember something, V404 Cygni is a few thousand light years away from earth, if we see that black hole feeding, it means it did a few thousand years ago, not in a thousand years