There’s a convergence of issues. First, and probably foremost, users are idiots. So it has to be able to be operated by a 5 year with a learning disability. Second, implementing security costs money up front. It is cheaper to let the customer deal with the fall out, then do damage control on the cheap, and keep going. Third, users can’t be assed to access things that a 5 year old with learning and physical disabilities and a peanut butter and jelly sandwich in one hand can’t access. These are all typical issues stuff is engineered towards. This is why you see this same basic issue crop up over and over again.