Quote:
while HU limit may be solved using math, NL is not and never will be.
Actually, if you're willing to generalize a bit and work with a handful of fixed bet sizes NL problems can often be easier to solve than LHE problems, because there are so many fewer compounding decisions. Exploitive analysis in the vein of "if this condition is true this is profitable" is actually often extremely easy with NL.
The value of GTO strategy isn't in trying to play GTO, necessarily, but understanding, at least roughly, what GTO play might looks like does help you to be able to exploit your opponent maximally (more on that in the article somebody linked) and hence my interest in GTO stuff as opposed to exploitive stuff.