I host, and am often a guest.
As a guest, I don't care if I never meet the host; I'm not there for them, I'm there for something else. I don't book a listing to meet a host, I book to accomplish a goal in that area.
As a host, I meet the guests that want to be met, if we're even home during their stay. Since we host a room in our house, sometimes we pass each other and meet, other times they message to say they'd like to meet, and other times their hours are so different from mine that we never cross paths. Then there are the times that my wife and I are out of town during the entire duration of their say, in which case there's no way to personally meet them.
So to say that every host should meet every guest is unrealistic. If that's your way, and you acheive that every time, congrats! But not all of us share that philosophy, or have the means to even if we did.