I don't follow. Where did this happen?
Oh. You're one of those people who thinks that "mage" means "only the six skills that happen to be listed under 'Magic'". Never mind.
What's the point of being a mage if you can't really do much of anything with magic? It's not mage-ish to go to thief-school to learn how not to be heard or how to open locks, especially not when the lore indicates that you have plenty of ways to fix locks and in fact have much more potential for it than any locksmith could hope to have. It's not mage-ish at all to go to rogue-school to learn how to mix potions, particularly not when the gameplay is designed so you'd need to do it fairly often to simply stay alive.
Seriously, read almost any issue of X Men to see just crazy powerful telekinesis could be. Lift yourself, lift something else, manipulate something else, or do a Vader-style force choke on some enemy. Huge number of applications, really. Think about what you could do with Destruction and fire spells. Morning shave? Check. Fried eggs? Check. Melting enemy equipment? Absolutely. Melting a lock into scrap? You betcha. Melting the eyeballs of an opponent? Hey, why not? And much the same thing can be done with frost, making metal brittle or causing the liquids in an eye to become a lot less liquid. It's all those crazy applications that make mages fun to RP. What can we in Skyrim? Well, we can be the arch-mage who can cast a mere few dozen pre-made spells and who kills his enemies by... summoning allies to kill them for him. Who opens locks by... pretending to be a damn thief. Waow! Exciting... *zzZzzZZzz*
If you think magic is awesome in Skyrim, you either don't have any creativity whatsoever or you simply haven't spent more than a few seconds pondering what magic could be like. Hint: When you play table-top RPs, your game master isn't going to simply hand you a list of spells and then insist they can't be modified for special applications in any way whatsoever. As a result, mages are fabulous lock-openers, if a lot slower, more spectacular, and much less discrete, than your average thief. This is just like how in the real world an explosives expert is way better at opening locks than any locksmith ever, at the cost of making a lot of noise and needing a lot of preparation. And ruining the lock and possibly everything behind the door, mind. It's the same principle, though.
Maybe you just want to hose stuff with a fairly useless flamethrower. Me, I want to hose stuff with a potent frost-thrower, just because I can. I want to create a layer of ice on the ground between me and my enemies and laugh as they fall to their asses. I want to ruin the footing of archers shooting at me by lining their boots with ice. I want to pursuade criminals to cooperate with me by literally lighting a fire under their junk. In short, I WANT TO ACTUALLY RP!
What I don't want is to use the same diplomatic means of extracting information as any ordinary bard or rogue or clumsy oaf of a warrior. I don't want to open locks by fiddling with a pick like some fool thief, as if an arch-mage would ever lower himself to learning a menial craft like that. I don't want to "pick" locks, I want to nuke them. If I can melt dragons and freeze giants into giant statues then how can I not be able to tear apart some freaking wooden chest? Heck, I should be able to tear it apart with telekinesis alone.
It's not like we've ever been able to do even half of the above, but at least they could call it hardware-based engine limitations in the past. Currently it's just flat-out design choice to intentionally move away from letting magic ruin the linearity of the planned gameplay. Because yes, as an arch-mage you damn well better believe that I'd put a new meaning into "burning stomach ache" or "cold shivers down the spine". If only the devs and designers would get off their asses and let me.