Point of fact, Claws are not concealable unless you have a shapeshifting power.
The strength, spells, and etc. are concealable, yes, but they cost refresh--carrying a gun or a sword doesn't. And yes, those powers make them dangerous, which is rather the point. The lives of the PCs are supposed to be complicated by these kinds of things.
That said, a PC should certainly get a fate point if their tools can't be used for some reason. I've given fate points to a Warden PC to say he couldn't get his sword into somewhere, for instance.