Piazzolla had a complicated relationship with dancers. he was active in the GA milonga scene, writing arrangements for Troilo and subsequently leading his own OT. he got tired of the people complaining his music was difficult to dance to and after disbanding the OT decided that he wasn't going to make musical compromises anymore for the sake of making it easy to dance to. When he said his music wasn't "dance music" we should understand it in this context. He would have fully understood that some people would dance to it, he just didn't want to be constrained by the expectations of dancers in a milonga. Of course many subsequent arrangements by other musical groups of Piazzolla's compositions do make compromises to a greater or lesser extent.
And well, when I play music for dancers, I compromise.
When I dance, I would prefer that whoever is playing does not compromise, because I don't need the compromises.
I can therefore sympathize with Piazzolla's frustration.