A bunch of slightly differing sides enter. Probably none will leave.
LET THE BATTLE . . . BEEEEGIN!
Pretending that a vote existed, I would vote for it to be available as a cross-class skill for all the other classes. From a "PnP Rules" standpoint, it is available to all the other classes as a cross-class skill, and it seems like we want to come closer to PnP.
From a logical standpoint, it just doesn't makes sense for only two classes, one of which isn't even a spellcasting class, to have access to the ability to work with magical devices. Now, it could make sense that they could specialize in it (being tricksters), but that doesn't mean other classes couldn't pick it up as well. For example, wizards specialize in being smart and knowing about magic, so why wouldn't they know how to tinker with magical items? All of the spell casting classes should have access to it, at the very least. And why not the other classes? I mean, it's a skill not a class feature like wild empathy. It's supposed to be something anyone can learn with practice. Upon examining the description, it seems like it's sort of the fantasy equivalent of learning how to hack into a computer.
I don't quite understand why being handsome affects how well you can use it, but that's WotC for you. Maybe you have to successfully seduce the item.