Because people have forgotten real-estate is an investment, and think it's a machine that just prints money for them. When the inevitable reality check comes, they get emotional.

No sympathy, though. It's nice to see some councils are finally changing the rules to put a stop to the Airbnb nonsense, even if others are all 'we can't change the rules, people have made investment decisions based on them'. That's the risk you take when investing! Bigger risk, bigger returns. You want minimal risk, put your money in the bank.