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The people who keep advocating for trade schools forget that what they're doing is exactly why college degrees lost so much value and became so expensive. Everyone starts wanting a trade certificate or whatever? Suddenly a lot of sleezy ones pop up, valid ones jack up the price and introduce feature-creep, etc.  
Not to mention that not only are you increasing your competition in the trades (thus driving down profits), you're also eliminating customers because everyone who gets that certification and moves to a completely different field is now someone who will fix their own shit instead.
We actually need to ne pushing for people to go to college more for certain things like RNs and medical care in generally.  Not saying trade school isn't a bad things at all but there's a huge shortage in RNs. And teachers to. >

The same concept applies to trades.