The pitot tubes are heated to prevent them from icing. I am also sure there is redundancy in the system and procedures already in place to prevent or correct instrument failure. Don’t assume that those of us discussing this are “smarter” than the aircraft designers. Although this plane is the result of a partnership between a government and industry so that in itself could be a recipe for trouble.
I’m familiar with pitot heat. In light planes you need to get it on prior to, or immediately upon, entering icing conditions. Not sure about airliners. Regardless, the tubes don’t expand to crack off built-up ice like deicing boots do. If the heater(s) or electric failed, they’d lose airspeed data, which is critical for manual or computer control.
It sure would be nice to be able to deploy a fresh set of tubes.