A better statement is that F1 should be punishing rather than dangerous- the possibility of a big crash is there (and many crashes are entertaining due to their spectacle if you know there isn’t likely to be any injury, either because the crash is minor or a replay), but that crash is maybe only punishing due to crashing being unpleasnat and bad for any championship ambitions rather than because it may lead to injury.
I have some sympathy for people who say that F1 should be dangerous though, as many drivers- particularly drivers of the 60′s- think/thought the same. The trouble is, there are many more who would rather compete in the same manner as before, just without the risk of severe injury or death when it can often be easily avoided. I know Jackie Stewart faced a lot of opposition, but I’d be curious to know how many only opposed due to the convention of the time, and how many even with hindsight would still think the same.