I'll see your "suit" and raise you a nearly infinite number of gaming store owners who were gamers who thought they could run a business. I'll raise you TSR - a company run by gamers who thought they could run a business.
I mean, hrmmm, we have a current lawsuit trying to get the movie rights for one of the most valuable brands in toys, D&D, from a guy whose biggest claim to fame is ... well... probably the D&D movie.
I'm sorry but D&D is not even close to being 'one of the most valuable brands in toys' that statement is laughable. Nearly every other brand in toys is worth much more. You keep conflating WotC being valuable with D&D being valuable. I'm sure MtG is insanely valuable as a brand, but D&D? not a chance.