Totally disagree. If your passion for video games made you an e-games world champ, you’d won six-figures of prize money, and were a top-10 twitch streamer then they’d absolutely think that was cool.
On a more casual level, of course playing video games is a “mindless pursuit” but investing is (or should be…) something much more thoughtful.
ETA: perhaps I should have been clearer in specifying that it’s what you do with a passion and where it takes you (or you take it) rather than it simply existing. Thought that was obvious. I could also argue that just playing video games for hours/day isn’t actually a passion. It’s just an addiction 
But if playing video games leads to cool things like I mentioned above (or others, e.g. maybe you got into coding and designed your own games/apps) then it’s on the map for an AO.