I believe that both aptitude testing and IQ testing are considered when the education system plots out our paths. I also agree that aptitude testing is probably more important. On some test (I was given many), I scored high for mechanical engineering smarts. Go figure, since I was math-impaired! (But, I could be counted on to MacGyver things!)
But, as I mentioned earlier, the person that I envied the most for their functionality on the job was in special ed all her life! She could have run the place that I worked, I'm sure. Her mind was organized, not continually distracted like mine.
But if aptitude was taken more seriously, I think we would foster far more greatly talented people. I'd also like to see a greater emphasis on job training and apprenticeships - and life skills!