In other words, as a successful trading strategy why don't people short the VIX when it reaches 40, or 50, or 60, etc.? I'm sure many tried that in March of 2020 and got burned horribly, despite it eventually turned lower. It can continued to remain at that level of volatility or increase for an unpredictable amount of time. I'm quite sure you also suffer from backwardation as you are trying to nail that top, even if the volatility doesn't lower.
Also, if you nail the bottom in terms of a rally, which I believe happened in March of 2020, the VIX doesn't always decrease for some time. When it keeps going higher you get burned hard too, it's not a small loss. Just putting out risks, certainly nailing the top of volatility would be very profitable but a lot of risk. I'm sure people like poopy and other option traders know 50 better ways to do this then shorting VIX, but thought it was the easiest example to think of the risk/reward in doing it.