Yes, they could.
The app would need to be able to tell a seller that their house has a pet odor and that is what is keeping it from selling.
The app would need to tell a seller to rearrange their furniture because it currently make the living room look very small compared to other houses for sale in it’s price range.
The app would need to tell a buyer the house they want is worth less than other houses in the neighborhood that are the same size due to an unusual floor plan.
The app would need to be able to tell a buyer when the home inspection repair list is big enough to walk away from the house.
All this app would need is a way to download all the experience that only comes from being out there, seeing houses, writing offers, knowing the current market, and dealing with people.
So no, Realtors are here to stay.
I sold a listing of mine that did not inspect so well. Before we put it back on the market, we have to make some repairs. I have spent a lot of time advising my client on which repairs we need to do so that the next buyer won’t want to walk away. We don’t want to fix everything little thing because we don’t have to do so. The goal is just to do the big things so the next buyer still wants the house after their inspection.
I recently had a standoff with a listing agent when their seller did not do a few repairs they agreed to do. The listing agent drew a line in the sand and told me my people had to take it or leave it. Knowing that the seller had moved out of the house and was closing on his new house the next morning, I called his bluff by saying we would postpone the closing and go to mediation since that is how the contract says disputes are to be settled. A couple of hours later he was asking me what my buyer wanted to have done in order to close on time.
An app can’t do these things. An app can open doors. An app can provide paperwork to be filled out. An app can’t solve these types of problems. People are always going to want help from somebody who knows what to do, how to do it, and when to do it.