I never knew baby powder was bad!!!

I’ve used it on my kids since my first born in 2008 mostly for their necks and to prevent diaper rash but I never knew it caused cancer. If it’s so bad why do they still sell it? I’ve been using it on my little guy also since he drools like crazy so I add some baby powder on his neck but now I’ve have read comments and videos about how bad it is and I’m scared I’ve used it on all my children 😕