I work for a car manufacturer and a safety recall has to be managed via VOSA, it is not a convenience option it is a legal requirement.
My point is, I contacted Triumph diretly and they stated that the failure only occured with incorrect handling and that is why they would not help with transportation, which is contrary to the notes on the recall which state it as an "in service" failure.
However, you can't get away from the fact that this is a safety related failure that should not really happen. In the real world it does and happens to a great deal of car and bike manufacturers.
Ok, we could argue all day about whether it is their responsibility to transport the bike at their cost because this is down to the level of service they wish to apply.
Personally, I don't think their decision is in the best interest of the customer.