I am not afraid of rm -rf whole directory. I am afraid of other stuff that it can do to my machines. leak my ssh keys, cookies, persnal data, network devices, and making persistent modifications (malware) to my system. Or maybe inadvertently messing with my python version, or globally installing some library to mess up whole system.
I, as a well-intending human, have run commands that broke my local python install. At least I was vaguely aware of what I did, and was able to fix things. If I didn't know what had happened I'd be pretty lost.