While I do think that refusing to use certain skills that could make an encounter much easier for your party (reflects, blocks, condi removal, whatever) is a bit rude, I don’t think it’s kick-worthy. What if you were in a party with no Guardians? Then what?
If I was in the situation, I’d have asked if the Guardian could slot a reflect to help. If they cannot (“don’t have it unlocked”), or will not, then I just say, “In that case, we’ll fight the golems at the door then, since we’re obviously too squishy to survive the stack.”
Stacking is not the only solution to everything. If you group cannot or will not stack, then adapt.
I agree that in some cases it would not warrant a kick, but if I I’m pugging a dungeon or Fractal, other than Berserker’s gear, experience or whatever requirement I can squeeze into my ad, I expect people to support one another, while keeping their possible limitations and flaws in mind (PuGs aren’t anywhere near perfection, after all).
However, if one person can secure others’ ability to deal damage uninterrupted by the press of a button, and yet refuses to do so, then I might feel inclined to expel said individual from the group and replace them, because in the end, if your <Insert Profession Here> won’t provide that which they’re expected to deliver, why not simply replace them with another profession that, though unable to fill the former’s niche, can potentially fulfill a different role (better damage, stealth and/or other utility).
I don’t care much for the projectile absorption, stealth, might stacking and/or other goodies, as the group can probably manage without them. I just like it when people are willing to leave their zone of comfort to give their team that extra edge.
