This has been discussed ad nauseum by insiders to the industry for close to 10 years now. Nobody has yet pulled it all together, not for lack of trying, but because of the one major roadblock that you mentioned -- actually going to look at homes. Everything else can be put online, and most of it already is online in one form another, just not always through a single vendor.
I know I'm simply expanding on what you already said, but ... one way or another, you have to go look at a house that you intend to buy. And you don't want the seller there. So you need someone who is trusted by the seller to let you in.
If you can put together a service whereby someone other than real estate agents can do that task, then maybe you could gain traction on everything else.
But I have not talked to anybody who is interested in the work of automating everything else until the problem of physical access to homes is solved, because there isn't money in paperwork. The money in real estate comes from two sources - commissions and mortgages. And most marketing plans depend on reducing commissions, not just redirecting them to a new recipient. So it makes much more business sense to ignore the paperwork that agents normally do, and focus on the mortgage process than the inspection, title, closing process.
After all, that paperwork isn't a pain point for buyers or sellers - they don't do it anyway. The agents do. So the attitude becomes one of, "Who cares if an online service automates the paperwork, when you still needed that agent to open the door? Let the agent go do the paperwork, and at least do some work to earn their stupid commission."