This is just not true. People don't usually sell their homes to cash in. Selling a house is a stressful, complicated process and it's also very expensive. You can't keep your home listed for long because people will see it hasn't sold. It also involves uprooting and relocating your family, moving all of your belongings and you still have to live somewhere.
The real gambling was 10 years ago. Having had a few relatives try (and fail, in Vegas) to do just this, I'll have to disagree. Watched about $45k in downpayments+fees in each case evaporate as well as the credit scores as they defaulted.
As I mentioned, I personally know three people who typify what is happening. One is a commercial airline pilot. Another is military. The third is an electrician.
The electrician might be the one who would be most typically a "flipper" except that he has no time for that kind of nonsense because he's also a foster parent for Clark County.
Also, Airbnb is illegal in southern Nevada,† with the exception of the Las Vegas city limits, which is a very small area, and not part of the "resort corridor" that everyone knows about.
† http://www.clarkcountynv.gov/administrative-services/Pages/S...