1. Real estate agents aren't often "experts" at real estate valuation, inspection or execution; They have dependencies on appraisers, inspectors, and lawyers. The work an average agent does is more or less cookie-cutter from my anecdotal experience, though I think there is a proportion of rockstar agents that do much more.
2. Not every buyer wants homebuying to be a client-services relationship. I'd rather have a trusted intelligent ratings system based on criteria like location, price and so on. I would hypothesize that there is a divide here with boomers and millenials / gen z. If I sell my house, it will be on a technology platform that takes 1%, not through an agent.
3. The vig an agent takes is insane in urban centers - 3% might make sense in areas where the avg. home costs 200-250K, and is harder to sell. In dramatic sellers markets where homes are in the 600K - $2M range, the take should be much much lower.