I feel like the healer concept has changed so drastically to the point that being a traditional healer is now a bad thing in the eyes of many. This partly has to do with how complex games get the longer they go on and live service/gacha games are a good example of this. You see launch healer stay the same with little to no changes to their kits down the line, and then newer healers get added that may not heal as much as the old ones, but they do provide more utility to the team, which makes them get picked more.
Someone in the comments also brought up the fact that in OW2 the healers aren’t really healers anymore, they are dps now, and yeah it’s not just a problem with OW these days. A good number of games now treat the healer/support role as a second dps class. I think the reason why is because the majority of players don’t want to actually play a support role.