I hear what you are saying, and I think the example you used really is pretty accurate. If an enemy player in general (DPS or otherwise) is going to duel the enemy support and bait out valuable CDs, that is a win in a lot of scenarios. It’s not always killing them. But the bigger issue is the kits of a lot of these supports are so bloated now, and their healing and damage (generally) are so high (often together), that you’re not soaking up enough value even trying to engage on the support.
If you were going to use that Genji/Ana argument in OW1, I would 100% agree with where you were coming from. In the first ~2 months of OW2, I would sort of agree with you. But once they removed the better DPS passive, and they really started bloating up the supports…the argument is moot now. Ana has become, by comparrison, a more moderate support as compared to Bap, Kiriko, Illari and even Lifeweaver in a lot of regards. Ana, who has been critically brought up constantly for over a year. And I am not saying she is still faultless, but in the face of the other support problems…she does seem tame.
If we are still looking at Ana here, and going along with your analogy with current balance…Ana is not getting run with Zen or Lucio or even Brig right now. Not as a general pick in nearly any SR if your team is trying to win. So any other support Ana is being played with, is able to both solo heal a team while Ana is using tremendously valuable CDs against the flanker, and has something in their kit to make that fight end. (Moira can throw an orb or flat out do damage, LW has pull/petal, Kiriko has tele/suzu, Illari has damage/pylon/knockback, Bap has damage and immo). What this has done over the life of OW2 is basically hard punish diving/flanking the supports so strongly that it is hardly considered a viable option at all anymore. It’s a bad play. And that is unhealthy for the game.
In OW1 terms, before healcreep got out of control, the option in that exact scenario was your team floundering a bit certainly because your main healing source is unable to heal for a few beats. Ana using such valuable CDs was much more potent in OW1 than OW2 (with the support passive and less overall healing, and more targets requiring healing). Your peel options to help Ana from the earlier list was, basically, Baptiste who might not be able to split his focus now, since there was a second tank health pool he had to keep up (and more reasons to save immo, with one more ult on the field), and Moira who could do the same as now, but was generally a less valuable pick (also, she was weaker in OW1).
Right now, and I say this as a support player, the DPS need to be much better overall players than the support players in any given game to generate any real value. And that’s a huge problem.