You've seriously never heard of the term 'safety razor'? https://en.wikipedia.org/wiki/Safety_razor

Now, they're still not things that you would give to a child, but the point is, we don't just throw our hands up and say 'razors will never be safe, why bother?' but instead, we try to make them safer. Doing nothing because we can never achieve perfect safety is reckless and uncaring.