It's not every 20 years, it's pretty much a constant. Some games or trends just happen to get more mainstream attention than others.
I don't think we're ever going to truly get rid of this sense of "this thing is bad for my kid, we need to get rid of it!" Since ultimately some bad thing happens to a kid/parent and they feel more validated amongst others who feel the same way about that thing. That's an incredibly powerful emotion.
We probably just need to be better at getting people to be generally more open minded and to see the world in less black and white terms.
I don't think we're ever going to truly get rid of this sense of "this thing is bad for my kid, we need to get rid of it!" Since ultimately some bad thing happens to a kid/parent and they feel more validated amongst others who feel the same way about that thing. That's an incredibly powerful emotion.
We probably just need to be better at getting people to be generally more open minded and to see the world in less black and white terms.