I would rather that the noise from the drakes bring kobolds to investigate instead of us running into the next room where they’re bunkered down or have already laid their traps. Right now the kobolds don’t have any particular reason to expect that there are intruders; for all they know the drakes could be making a ruckus just because a kobold were annoying them or they’re hungry. If we focus solely on killing the drakes that would leave us open to whoever comes to investigates, sees that invaders have made it inside, then turn around and warn the whole cave.

The drakes are a distraction but we shouldn’t let them distract us. They aren’t going anywhere in their cages so they’re not a threat, we can kill them after we make sure anything that could let them free is also dead.