This is a very SF-specific view of the world. :)

Rent control is specific to just a handful of locations and is often subject to statewide restrictions (e.g. Costa-Hawkins). In general, renters are less inclined toward NIMBYism. This is especially true for the younger ones, who don't benefit as much from RC even in the locations where it exists. And even rent controlled tenants don't like the fact that they can't move.