they picked overwatch because for some reason overwatch is the only game that any publisher actually advertises and advertises heavily as an esport
valve doesnt advertise dota 2 or csgo or tf2 at all because they're lazy fucks
who gives a shit about hots, wow, hs, or starcraft esports lmao
smash actually gets some reasonable coverage on local stations (e.g. hbox on his local fox news, and his local fox again) but it's still only a grassroots esport
riot markets league only so much
and every other esport is irrelevant