I think this title is a little misleading. What I feel like this is saying is that gaming might help kids, but really doesn't address "gamer" as a career choice. In terms of careers the content of this video feels gaming adjacent. My personal thoughts are that professional gaming is hard and really depends on the company and fan base which are the people who will usually be funding the prize pool. It is hard to be the best at a game and imagine if that game doesn't even have a competitive scene or dies out. Reflexes dull over time and how soon is it going to be until the next 16-year-old prodigy is going to replace you? Careers in competitive sports don't last long. Just look at athletes, they really don't make that much money unless they are sponsored. The US pays around 40,000 per gold medal. That sounds like a lot until you factor in the thousands of hours training, equipment and you have the pay the coach, rent, food, and not to mention you actually have WIN! The more lucrative/consistent option is streaming or content creation on video platforms and if you are lacking on personality or skill it is going to be much harder to establish an audience especially if the platform has low discoverability.
Gaming can turn into a professional career; however, there the field is so tough because the gamer has to find ways to be innovative/different from everyone else that's doing the same exact thing. The gamer has to be able to market themselves differently from what others are doing. Also, having a supportive fanbase is important when it comes to gaming also.