I wake up at 10 AM to work then go to college from 4PM to 9PM and then spend an hour learning a new language and then watch some movies or play some video games. Sometimes I don't know which of them is the most pointless...
But that doesn't matter - meaning is subjective & you make your own. If something is meaningful to you it's not pointless.
Yeah, but 10,000 hours of COD? That's about 5 years of playing from 9-5 every weekday. That's not enjoyment; that's an illness.
I can't even imagine the ennui of playing 10k hours of the same FPS or even the same series. "Soul crushingly boring" wouldn't even begin to describe it.
As such it's a way to feel accomplishment and growth for people who don't have many other opportunities for feeling those things.
It's particularly appealing for people who struggle with participating in the usual venues for this, like sports clubs and other socializing that usually requires meat world interaction, which isn't a very easy thing to participate in for people with social anxiety issues.
Maybe our perspective is that of someone who was in a similar place, and is now looking back on our lives with the benefit of hindsight.
It's not obvious to me that people will take a low-effort dismissal of their personal issues and turn that into a valuable learning opportunity.