I've tried, honestly, I've tried to find a context in which MoG is not a suicide pill, and the fact that I can enumerate them from memory after months of not playing my 50 regen is a sign:
1) it sure scares off stalkers. Fine if you want to be left alone. And some stalkers are so dumb they thing it was assassin strike that brought your hps so low. But PvP is a dumb reason for any power.
2) Sometimes you find those mobs of wolves who only have lethal/smashing powers, or something like that.
It's a dumb power. It's actually a flip side to another dumb thing about the game. A smart designer would not have made one form of damage the uber damage (Psionics), but would have adopted a scissors/paper/rock system (so fire should be really good against ice, for example). That would have been in the spirit of super heroes from Achilles to Superman: invincible, but one hidden weakness.
Bt anyway, there are always people who claim everything requires 'skills', they are seldom willing to explain the skill involved. It's a very tedious thing.