It isn't. You can accidentally — or purposefully — use a knife to hurt yourself or someone else. But a knife is a perfectly safe and useful kitchen tool, if you're experienced using one. Psychic powers are much the same. The key isn't to hide your powers or stop using them because you're afraid of them, but rather to use them more. That way, you understand them and learn to control them.

[ As he speaks, he's mixing in the onion, and his chopped cabbage, just enough to combine everything. He turns to the stove. It is, like everything else in the apartment, quietly luxurious: a solid, smooth slab of obsidian, that heats instantly to any desired temperature. He flicks it on and then dumps the whole mixture onto the stovetop surface, and forms it into two flat cakes. ]

Not using them — that's a recipe for losing control. And then you're even more afraid, and the vicious cycle continues.