DM near a BH "Having to lose energy" due to baryonic non-interaction. To my newbie status, this is a puzzle. DM is mass of an unknown type. It may, for whimsey's sake, be a simple (as yet under-appreciated) field that is somehow modified by baryons & gravity wells.For DM to aggregate around black hole it would have to lose energy while in vicinity of black hole. As DM is not interacting with anything (except gravitationally) it can't do that. So as it falls down in gravitational well it just as quickly climbs out of it except if it hits BH directly, but as Janus pointed out it's very small target to hit.
Speaking of wells, "climbing back out [of a BH well] also is a puzzle to me. Either DM falls into a gravity well-or it doesn't. What would make DM change its inward trajectory?
Protons repel each other unless a certain closeness is forced-then they attract and stick.
Is the general DM/gravity attraction (but not aggregation) as you imply-reversal back up away from BH wells similar?
Also if DM doesn't aggregate to galactic centers does this imply that DM's "normal" state is that it can't be "compressed" ... except perhaps by DE?