Probably if Yubico could go into this business and issued their own cryptocard connected to wallet secured by their HW security key some people would use it. I don't see any difference between (let's say Wirex) crypto card and the card issued by Yubico. However, it is inclusively my own assumption.
There are people who store their bitcoins on a centralized exchange account and lose it when it gets hacked. That doesn't make the solution good. If such a service were to be created, it has to offer very competitive rates to not be a service a handful of users use...