Dear Diary...
...I know several tango dancers where the life partner doesn't dance. But how do I know if and how their common life is organized? When one person preferst to dances significantly more, or is more successful than the other, I already see difficulties. Of course, even without dancing, a marriage can become purely a partnership of convenience while building a house and raising children. And if one partner then wants to find fulfillment in dancing, something has perhaps gone fundamentally wrong, and the other should also prepare for the end of the relationship.
My girlfriend, at least, finds it amazing that we have a shared hobby with a shared circle of friends; she didn't have anything like that in her previous marriage. Naturally, one shouldn't base a life together on dancing, especially since illness or injury can interrupt it at any time. But simply saying "I don't want to dance anymore" isn't an option either for me.
The largely serial-monogamous partnerships of our Western culture - I linked to some research on this before - function best when the partner is unquestionably the top priority. Which practically means that tango can, at best, be a secondary priority. Put-downs and criticism can happen, but they must then be addressed appropriately. And suddenly wanting to dance, as well as suddenly not wanting to dance, are difficult signals to send. How can compensation be achieved when one partner is more or less constantly striving and chatting towards the next tango experience?
Basically, couples who want to start dancing together might need strategic guidance that puts them both on equal footing. And if the realistic outcome is that both have to forgo a vacation budget so that he can get private lessons from a fiery Argentinian teacher alongside the dance classes, then it's simply a matter of priorities.