[bawolff]

I mean that's pretty much it. You can't use a quantum computer like a classical computer with a huge (infinite) number of compute cores. Its not a gpu. That's not how it works.

If you use the metaphor that superposition is like computing many things in paralell, the problem comes in that when you measure. The superposition collapses to a single answer at random (with probability related to the amplitude of each possibility) which will usually not be the answer you're interested in.