"Just let people be responsible for themselves" would work if we hadn't built a society that neutered everyone's ability to take care of themselves by gutting education systems and disconnecting people from political participation and social responsibility.

Tldr have you met people? There's a reason seat belt laws exist. If we're going to let companies sell things to this population we've fostered and not take our own responsibility, we have to put it on the companies.

A quick browse through any of the shock content subreddits will reveal a lot in terms of average people's understanding of risk.