Abstract math is a good proxy for how human mind works and deduces and reasons about complex topics. I can understand if you do not see beauty in that, but stretching that to "you liked it because it had no use" is inappropriate.

Edit: I imagine you were just tongue in cheek, though.

While you could construe the negation to be what you propose, it's not uncommon to read it as "not having to have a use in mind".