I think it is a terrible strategy to try to convince homeowners that its best for them to forego clear economic benefits for blurry future profits. The solution is land value tax: just remove city sales taxes and add a tax on land. That will make low density units more expensive, the tax burden is relieved from the renter and lands on the homeowner and renters see their income increase immediately.
Activism to push change requires a lot of energy and time. Most of the people who live here are busy with their jobs and families and do not have time to invest in it. So the activists who have the time to push usually want radical changes, such as 100% low income housing or homeless shelters. These are fine ideas, but for communities of upper middle class families, the change is scary and usually unwelcome. So then those families suddenly find the time to show up and protest and that's where you meet NIMBYs.
Change like this really requires the will of the local governments to make progress. Yet I think they get elected on other platforms such as, building better schools, or improving roads or downtown small businesses. YIMBY seems to be the first political wave of politicians actually running on a platform of more housing.
That sounds like too much.
Though, I don't think this is "rent control" in the NYC sense of the term where rents are kept way under market rate.
Rather, it seems to be a set of ordinances around what landlords can and can't do, largely pertaining to rent increases: http://sfrb.org/rent-ordinance
I don't think most people enjoy this benefit of rent control, it wouldn't make sense to rent out properties. I wonder what is the effective rent control rate (that which has affected price significantly). Maybe a rental turnover rate would hint at a solution.
SF is 63% renters, and should be able to outnumber NIMBY homeowners easily to have a lot more dense housing built. Alameda County is in 2nd place at 47% renters [1], so only a small percentage of homeowners need convincing that this housing shortage is bad for everyone in the long term.
[1] http://www.towncharts.com/California/Housing/Alameda-County-...