I used to work in the real estate tech industry. The vast majority of companies in that space view brokerages as their primary revenue source and develop software designed to give brokers more structural advantages to extract middle-man profits from renters and buyers. Zillow is the largest and most successful RE tech co to pursue that business model but they aren't alone.

Redfin is attempting a different business model that is in many ways hostile to brokerages. This is political stuff, basically. Changes to the relationship between landlords/sellers, brokers, and renters/buyers will have very large scale economic consequences and also likely result in long term changes to the way neighborhoods are constituted and populated.