I don't think they would. It's just one fight. And not everybody would be able to do that fight, because I would say it'd highlight the problem with the approach the devs are trying to take.
For people on the high end to find the role engaging with the current design philosophy, those on the low end suffer. Because they would have to up the incoming damage to a degree the high end players are more engaged. The problem is, experiences still do their daily roulettes, they still do solo content, they still do normal raids and alliance raids and heck, your semi-casuals don't do Savage and EX that often.
We've already given lots of feedback on the healer forums on how they could avoid that problem whilst still giving high end healers an engaging enough experience where the lower end healers aren't suffering. But they have said they won't do it.
Really and truly all they need to do is:
1) Increase the healing requirement on content where it is necessary, so where you'd expect to be challenged more.
2) Accept healer downtime is a thing and mitigate it by given them more to do in that downtime.
Sadly point 2 is the thing they're refusing to do beyond what they already have for SGE & AST, which are steps in the right direction. With the devs refusing to give a better DPS kit, they only thing they can do is make the healing requirement consistent enough to keep it engaging enough to not fall into a single button spam. The balance I felt leveling SGE was practically there IMO, but everybody was undergeared and I had to work harder to get people to full and everything is still new to people. It's when people get better at the content and better geared we see that pressure on the healer get lighter and lighter, whereas I would prefer if it remained at that level. Point 2 however, acknowledges this is an eventual inevitability and gives us something to compensate and if point 1 is adhered to, then there will always be content that is engaging for those who want that challenge to their healing without it impacting people in easier content.