Comment by andrewflnr

You kind of had it at first.

> At most, all you can say is that if you select a universe at random, it's likely to be a high-black-hole universe.

Yeah, that's sufficient when it's caused by their heritable properties. The proportion of high-black-hole to low-black-hole universes will approach 1:0.

Extinction is not part of the definition of selection pressure. Even in biology we still call it selection when a species merely gets pushed to the margins of an environment instead of driven extinct, or when a trait merely becomes uncommon instead of disappearing.