There's a lot of advice I'd give my kids, but as far as the above statement is concerned, I would not encourage them to get into gaming or being a professional Youtuber or any of the online money-making stuff the younger generation is into these days.  Would I discourage gaming in general?  Hell no!  I spent a lot of time playing video games as a kid, but doing it professionally--even if it's lucrative--is a waste of your brainpower.  The world needs the younger generation to get into STEM fields and teaching and all of those other professions that actually benefit humanity in a significant way.

How much does anyone benefit from someone becoming a professional gamer/social media influencer/whatever other than the person whose career choice that is?  Answer: very little.  I see a lot of intelligence being squandered just watching Youtube videos about how people have dropped out of medical/vet/dentistry school to pursue a career as a Youtuber, and I find that utterly repulsive (and if I'm being honest, selfish).

Yes, there's a lot of money to be made by gaming or other online ventures, but money isn't everything and even those careers in gaming and related stuff aren't guaranteed to be there forever.