Ya, just to give you an interesting example:

The great SciFi writer Isaac Asimov, once scored extremely high on an IQ test.

Later in his life, when his car broke down, he took it to the garage to get it fixed, and talking with the mechanic, he said he realized 3 things:

1) His IQ was no doubt way HIGHER than the car mechanic, as measured on standard IQ tests.

2) But despite his significantly higher IQ he could not fix his own car. He tried in the past, but just couldn't.

3) That's when he really realized that human intelligence is quite complex and multifaceted and that even if someone how might score lower on an IQ test, they were still perfectly capable of blowing him completely out of the water in terms of intelligence on other tasks/fields.

So in the end...

Maybe your car mechanic doesn't know his Type 1A supernova from a 1B... but unless you've repaired cars all your life, you might lucky if you can even manage to change the oil on your car!

And changing the oil is about as basic as it gets in car repair!