A few wealthy people try to get involved, but there is a strong segment of the electorate and press who are extremely skeptical of wealth (other than their own house). Ron Conway has been portrayed as a boogeyman for many years for his contributions to candidates (https://48hills.org/tag/ron-conway/). Yelp founder Jeremy Stoppelman has been making donations in favor of relaxing zoning. I think it just takes a long time to convince voters that housing supply is an important issue when they are insulated from the housing market due to rent control, benefit from unaffordability because they own real estate, or have read too much misinformation from the “progressive” press who deny that supply affects rent.