This is why there is such a thing as a power rack/squat rack. You can fail completely safely with this equipment.
If you are an olympic lifter, almost everyone is taught how to bail these lifts from the beginning with the empty bar. Most people aren't and lift in racks built just to be able to safely lift heavy. Its on you if you don't actually set up the safety bars for yourself.
Failing safely in a squat rack means you know how to bail from the weight in a way to not further injure yourself. Thats not immediately obvious, like learning to fall in other sports. I know people who were in athletics, using the school squat rack with a coach, and still ended up with injuries. Not everyone sees an olympic lifting coach before trying olympic lifts at the gym, probably a very small percentage actually do.
Any way that you fall, the pins will catch the bar before it lands on you. Failing safely, for the most part, only requires knowing how to set up the rack and safety pins properly.
Even barring that, the injury rate in squatting is quite low compared to most other sports and athletic activities of similar intensity.
If you are an olympic lifter, almost everyone is taught how to bail these lifts from the beginning with the empty bar. Most people aren't and lift in racks built just to be able to safely lift heavy. Its on you if you don't actually set up the safety bars for yourself.