Well, there's an attitude I've often encountered on this topic, with several people, including yourself.
It often starts with uninformed, often outdated criticisms on what someone believes to be a juvenile activity.
Then when individuals present valid arguments against those criticisms, to turn things to a relatively in depth discussion, those that critique it, quickly fall back to a condescending attitude. Their defense being that because it's such a frivolous activity, it's not worth discussing, and anyone taking the topic seriously, should not be taken seriously.
I'll discuss gun control any day of the week with Vashti, but when it comes to anything videogames, it's like talking to a broken record.