So if you know that as a performer you rather want to keep your distance from the audience, which is fine, no judgement here, it's just a different style, well, then you probably won't play house concerts. Yes, the way the host treats the performer is important. In general, we try to have everything set up for the audience's comfort before the show, so that when the artists arrive we can see to theirs. We are as flexible as possible about lighting, chairs, stools, food and beverages, including when they would prefer to have a meal. During the break, we leave the artist free to make connections with audience members.
Some performers find it too intense.
Some find the expectation of visiting informally with the audience uncomfortable. Some don't feel comfortable without a good sound system. Some need more privacy than staying in someone's home can provide. House concerts are not everybody's cup of tea, but some folks thrive on them. Hosting house concerts is a lot of work.