It helps to remember that life is complicated and there are limitless factors that can contribute to a family dynamic. Growing up my parents barely knew what the internet was and just associated it with "the computer". They attuned it as a "toy" and nothing serious. This allowed me unfiltered access to anything that was on the internet at the time.
You'd hope today's parents are more knowledgeable but I bet the majority of parents are just trying to get by and aren't ramped up as to how everything works today. They may be pressured to go with the technological flow head first due to society without fully knowing or controlling everything.
Anyways, back to my point, telling someone to "go parent right", especially as a non-parent, maybe you can approach it better.
And my main point that supervision and parenting go hand in hand doesn't require me to be a parent to know that, in the same way that I know that a handsaw can be dangerous yet I am not a carpenter. You don't need to be Parent of the Year or a genius to know that leaving children unsupervised with something can go very badly, like leaving them to play with plug sockets... My parents didn't need to get to their second child to learn that - it's obvious.
I'm not sure how else I could possibly word it to make such an obvious point more palatable, even though I am no expert in parenting. (I do have cats though and I know not to leave ANYTHING out because they wreck it.... That also doesn't take much to work out even if you don't own cats!)
How is playing games online where you can communicate with random people across the world without any sort of parental supervision possibly a good idea?? And why is it someone else's problem?
I don't mean this rudely, but how about actually doing some parenting?
I used to work with a guy who said the schools should be doing more to make children behave better, as if he was somehow absolved of any input. Absolutely baffling.