[Pip Boy]

The fact is, if we use Gurps skill levels and compare them in Job Tables, and that tell us Mages would have skill level 12-14. But, IMO, magic NEVER got +4 or +5 bonus of a "simple task".

So, a wizard using Shape Earth to fabricate a horseshoe would probably have a worse shot at it than a Blacksmith of same skill level. Magic is faster and with spectacular results, no doubt there, but way more unpredictable and unreliable.

And I hardly believe it that a Mage with Shape Earth 21, and a lot of Earth school magics at a high level would bother to manufacture stuff at industrial scale just for the money.

Participate on great works, sure; but fast-casting extremely good horseshoes at a machine-gun rate, at no energy cost seems a little overkill, IMO.