A few years ago, a director at my organization said at an all-hands meeting that he viewed "tech debt is a debt we never have to pay and have no interest on". In one swoop, he told the entire organization that technology concerns are not valid.
People have been complaining for years using specific issues. We could point at times that important services went down. We could point at full time operations people who have to babysit applications. We could point at failed initiatives. The bi-annual company survey always has "we're fighting the same fires" in the top issues.
I suppose the issue with talking about tech debt to non-technical people is that they don't care. It doesn't affect them. At least not directly, like it does for developers.