Conrad, I think I understand your position, and empathize with most of it.
However, if a given talented performer is trying to make a living in his art, but can't expect to draw enough to hire a hall, what needs to happen? YOU don't want him to do a paid concert in your home; fine! If I decide I really want to hear this fellow (we'll say "fellow" for convenience's sake) and don't think he will be able to perform in my town without a private venue, would you "prohibit" me from offering my hospitality? If you don't like the concept of a house concert, don't come!
If I DO decide to hold the concert, __I__ will decide whether I allow smoking in MY home. If I don't want the present secondary fumes during the concert or (to me just as important) the clinging continuing stink of smoke which gets absorbed into carpets, upholstery, drapes, and so forth, I will take that into consideration in making the two decisions whether to have the concert at all or whether to placard against smoking. In either case, that's no-one else's concern. If a smoker REALLY wants to hear Joe Schlutz perform, he can do one of two things:
1) Forgo smoking for one evening and come to my house to the concert.
2) Sponsor his own (smoking) house concert with Joe Schlutz.
If I understand your position, Conrad, you seem to be saying there should be no professinal musicians. Or that if there are they may only perform in venues that you approve.