I agree. The main reason why I'm a Support main in the first place is because nobody else will play them most of the time. It's frustrating, especially if you want to play as something else. Sometimes you can get someone else to switch by adopting an "if you can't beat 'em, join 'em" mindset and play selfishly as well, but I tend to feel like an asshole when I do.
That said, this event isn't super hard to finish on the easiest difficulty, even without a healer (unless everyone goes pure DPS/sniper). You could play selfishly for a few rounds on Normal and pick heroes with self-heal abilities, like Roadhog, Bastion or Soldier 76 (not Mei though, her attacks are bugged right now and don't slow enemies like they should). The stakes won't be particularly high that way, and you should be able to do it within an hour or two.
Zhukov said:
While I'm all for branding a ton of online gamers as childish, mean-spirited dumbfucks, this sounds like a game design problem.
If a game has a vital role that hardly anybody wants to play then the developer has done something wrong.
I don't know, Blizzard's provided a wide selection of healers for a variety of play styles. You've got a dedicated healer with super-fast heals and laughable damage output (Mercy), an AoE healer with high mobility and the freedom to focus on shooting things (Lucio), a healer/DPS combo (Zenyatta) and even a freaking sniper (Ana). That's not counting other heroes that can heal/buff others in a pinch as well, like Soldier 76's biotic field, Torbjorn's armor packs or Symmetra's shield generator. Yet the healers are almost always picked last (if at all), and the heroes that can off-heal are almost never utilized in such a way (at least when you're playing with randoms).
I think it's deeper than game design, it's actively trying to fight human nature. The only team-based class game that I've seen healers get picked first is
Wolfenstein: Enemy Territory, and that's only because the Medic was so overpowered that it was objectively better in a firefight than the combat-oriented classes. You'd have five Medics running around gunning everybody down on the front lines, yet they wouldn't take half a second to turn around and toss a health pack to their teammates.
The sad truth is that most people want to hurt things rather than than heal...at least in video games. I don't think you can ever change that.