He's right, of course.
There are multiple small-time guys who cover sports teams that have podcasts, blogs, YouTube channels and write for team fan sites, such as SB Nation. These guys were barely getting by, many not able to work full-time, having to take on other work just to keep the lights on.
Then came legalized sports gambling.
The people running the betting sites and the casinos want the unvarnished dope on teams, including anything these writers can dig up that may not make even regional headlines or broadcasts. These writers will do their interviews, check their sources, evaluate the All-22 NFL tape, and write a full synopsis of what's going on for their gaming employers.
For example, if they find out from one of their sources that Alvin Kamara was in the ice bath a bit longer early in the week and the Saints are cutting down his reps in practice, that's grist for the mill. This helps the gambling folks set the lines on games, using multiple streams (they hire multiple part-time guys for these reports) of information on each team.
I know two guys who cover the Saints, one who has been able to pay the down payment on his home with this money and another guy who managed to pay off his wife's medical bills and pay off some school debt.
The gaming people also make money off of these guys by distilling the information and selling it as a service to prospective betters.
Since we are establishing that all stats and data can be massaged, wonder what is the quality of the reports the betters are paying for? And...I wouldn't put it past the gaming industry to push or pull betting lines whichever they want them to go.