I disagree, the hydro stations that we have in place were in fact meant to transport electricity from place A (a mountain area, in most of the cases) to place B (where people actually live) in cost-effective ways, that was their purpose from the very beginning. Using that energy up increases the price people from place B have to pay.

You could say that one could build a new hydro station just for delivering energy to crypto miners but that would open another can of worms as we're slowly starting to realise that hydro stations are not the most environment-friendly things imaginable (especially when it comes to habitat loss and disruption).