The number of people who use their brains for more than getting a better paycheque is small, shockingly so. If you look up the people who've made all the popular javascript libraries of the past decade as one small example - you'll see that none of them are geniuses. They just had an itch that needed scratching. If you have that much, you're way ahead of the game, don't worry about the rest.
The question on my mind is the following: How is blindly trusting science better than blindly trusting the pope or your local shaman? Wasn't the real issue blind trust, rather than who or what?
There's nothing to be afraid of, and no reason to take a stupid test. I had to as part of drafting and I can't see these tests leading anywhere worth going. Maybe ask why being seen as smart is important?