Former Dynaudio dealer here, and with the Confidence line the dealer is contractually required to install the speakers in the buyer's home, which they cannot do if you're not local. Same with a lot of high end speaker companies. Selling to you and shipping them would likely violate their dealership agreement.
That they didn't tell you this is on them, but that would be a reason not to demo them for you. Not a good reason, but a reason. I would have set them up for a listen (if we'd had the 20's, which we did not) so you would at least know if you like 'em, but we're not a-holes lol.
The best under $20k speaker Dynaudio has ever made was the Contour Legacy, but there's only 1k pair worldwide and they've all been sold.
Disclaimer, I personally have Confidence 60's which are my daily drivers (pun intended), and Heritage Specials in my 2nd system. We recently dropped Dynaudio for strictly business reasons, the product itself is excellent. Our Confidence 30's will likely show up here if we can't find a local buyer.