While it's hard to make large generalizations, some people just don't make friends easily in real life and gaming/the internet give them a means to be themselves without having to worry about being awkward so taking that away is almost the same as telling them to not make any friends.

On the other hand, I've definitely seen an echo chamber effect where some people have negative growth socially due to the internet/gaming. E.G. The red pill or incel channels.