Banning or controlling Airbnb is simply not analogous to rent control. Assuming free market long term rentals and no NIMBY building restrictions, long term rental prices will fluctuate, and if the demand is sufficient, more units will be built.

That your plan for a house with a rental unit attached isn't profitable under the new regime isn't a disaster, it's the market doing its job. If residents wanted it enough, they'd be willing to pay for it. There is no disaster by definition.

You're not stating the obvious, you're talking your book.