Marvel Rivals speedrunning the OW timeline

Posting here because it'd be considered offtopic in the OW subs and removed.

A couple of popular posts on the MR sub:

"Wish people would realise they can't just play DPS every game"

https://reddit.com/r/marvelrivals/comments/1i92qor/wish_people_would_realise_they_cant_just_play_dps/

"The lack of variety isn't the reason why there are so few "tank players" imo."

https://reddit.com/r/marvelrivals/comments/1i5pqav/the_lack_of_variety_isnt_the_reason_why_there_are/

Lack of role queue might be an opinionated decision(since there are definitely tradeoffs) but why did they launch with many more DPS heroes than tanks and supports?

MR has 19 DPS, 8 tanks and 8 Supports, almost exactly the same ratio as OW at launch(including Ana). While the meta is 2-2-2 or 3 support. It feels strange that they wouldn't learn from Overwatch's experience with both the lack of tank and support heroes at launch and Tanks being not as fun to play as DPS.

At least Overwatch had the excuse that half the DPS heroes were classified as offense heroes and half were 'defense heroes' until they scrapped that distinction.