Your statement is pretty similar to what Yoshi-P said. Instead of "go play ultimate" it's "why not solo heal ultimate instead of focussing on getting more dps buttons?".
I understand that you're not a healer main and I don't think there's any malice behind your statement.
BUT
Instead of argueing things that have already been argued to death I'll instead ask you this:
Alright, so let's say I just successfully solo healed the most recent Ultimate. And it was fun, I had lots of stuff to heal and boii did some of those hits feel spicy. I still used my nuke the majority of the time but overall I felt like I had fun, I was engaged, I was under a good form of constant pressure. It was great! So I part with 7 other people for the evening after having achieved the not-impossbile-but-extremely-difficult.
What do I do now?
I can hardly spent my whole time in FFXIV solo healing Ultimates, right? I'll most likely want to cap tomes, do roulettes, farm some fates, get gear/ token from normal/ alli raids. What do I do there?
Do I go in, tell my co heal that he's not allowed to heal? Do I tell the tank that he better not use any mitigation at all? Do I tell people to please stand in the bad? Should I just play a different role?
What if I don't have a static but want to farm my weekly 2 chest in Savage? Or get some Ex weapons/ mounts? What do I do if the boss has an untelegraphed healer-targeted mechanic? Should I tell my group that I want to solo heal it but that we might wipe like half the time to bad rng? Should I tell my co heal to simply not touch any heal button? Should I tell the group that they shouldn't use any mitigation/ selfheal? Even without the infamous untelegraphed healer targeted mechanics, what's the plan?
What should I do, as someone who "maybe gets the job wrong", in your opinion?
I do expect an honest answer to this question. No trolling, no memeing.
Honest question, honest answer please.