> How will anyone find the house? If I use an online estate agent, then that's still a middle man.

Right now your realtor is paying your listing fees, paying a photographer (maybe) and paying to stage the home (again, maybe). Those are all fixed fees. Then the realtor takes a percentage of the transaction. If the realtor goes away, those fixed-fee services can all still exist and be easy to use. You could even replace the realtor with a general contractor sort of person who manages them and also charges a fixed fee and it’d still be a win.