I've stayed in multiple apartments in Tokyo and Kyoto using AirB'n'b.
The statements that finding things can sometimes be a challenge can be correct. I've had people, however, send me a document with pics on how to get there from the nearest station. My favorite was a link to a YouTube video walking from the station to the apartment - a brilliant idea.
Yes rooms are small. Most places advertising for 1-2 people are likely going to be studio apartments. That's how locals live and isn't that part of the attraction?
Many also include a personal wi-fi device and a guide to the area.

I'm going to hard pressed to change my practice