Let's put it this way-
Selection for the Olympics is not done with diversity in mind, it's competitive qualification. This Overwatch thing I'm hearing about, is it an Olympics-style thing where multiple countries send a team to compete? If so, how do they even decide who to send, especially for a team-based thing? They can't just select individuals, because the best teams work by being a goddamn team. The only way you can get "diversity" on a team is for said "diverse" person proving they have the skill to be as good as or better than the rest.
If there's no qualifier for selection, they may as well ask to get their asses kicked if they aim for "diversity."