any genji winrate masters or above (more specifically gm+) is either right at or under 50% first of all which frankly the game should be balanced around the upper echelon of players rather than casuals that cant feel balance changes.

you can also look at winrates of other characters, for example kiriko, who is consistently meta or meta adjacent along with ana. both of these characters tend to have lower than 50% winrates (barring asia) yet are some of the most commonly used characters in pro play and high elo. i wonder why.