Our set up is that we have a basement apartment with a keypad. A lot of our business is people arriving late and leaving early when they are passing through town. I feel like those people usually want an easy in and out, not an extended meeting/conversation/tour. They want a bed and a shower and coffee in the morning.
So generally I leave them be unless I really feel like they WANT or need a meeting. For our longer stay people I’ve done it both ways. Usually it feels like the tour is awkward for the guests. I have a detailed manual broken down into areas -everything they need to know about the kitchen, bathroom, tv, wifi, etc. Most of the time I let them check in on their own and send a message letting them know to let me know if they need absolutely anything. I usually try to find excuses to meet them and visit if they have time.
Most of our guests are here passing through, for work, or to visit family. Those people usually don’t want or need to spend time with me . They are here for a bed and a shower.
Furthermore, when I have travelled in AirBNBs I’ve never been greeted personally. I much prefer the ease of a keypad/box to having to interact with a stranger when I’ve just arrived in a strange place. Communicating through the app and perhaps bumping into people throughout the stay is much more comfortable for me. So obviously the response of the guest is personality based. Some people expect a personal greeting and others are kind of offended by it.
I used to think that a personal greeting puts a face on the listing and makes people more compassionate in their ratings, but I’ve found that isn’t true across the board either.
I would never knock stars off for being greeted or not being greeted. I would if the host was late or if the self check in didn’t work and the host wasn’t available to remedy the situation quickly. So I think it’s your call - you know what type of guests you have and what their expectations are better than anyone. Sometimes you just have to feel people out and make decisions. But I do agree with what someone said above - being a guest who is running late to meet a host would totally stress me out.