I wish it were possible for buyers to collectively jawbone the markets down… But I can’t see it happening.
All the other groups (owners, lenders, agents..) have a core of people whose livelihood and/or wealth depend on real estate going up. These people are in it for the long haul and/or full-time and fight all-out for their interests.
Renters looking to buy are a much smaller group, and membership is temporary by definition. No full-time professionals make money from lowering prices.