Because different people have different expectations for a given product and some level of expertise is required to understand basic requirements which most people don't have.

For instance most people don't know what is an acceptable level for various pollutants in drinking water. As such if there was no government oversight most people would be happy drinking poluted water and the few that care wouldn't be serviced as the cost of cleaning water for a niche wouldn't make it profitable. But hopefully we have laws that dictate safe levels and vendors have to respect them.

For hardware it's the same, experts are pretty clear about the risks: at the most basic level if hardware stop to function when some server crash then the whole society becomes dependant on this and as such any outages starts to have catastrophic consequences by domino effect. On the spying activity linked to those accounts the risk is pretty clear as well: it opens people to leaks of intimate details about their life to Facebook employees and various hackers in case of failure.

So it seems clear that public safety would require making those two activities illegal.