End of the day it's them that sets the rules. Don't like their rules go elsewhere but then there is no where else to go unless you find a specific courier .
As I said above. The same courier that delivered dive tanks to my local RFD would not lift mine from there to go down south. Different account types. They did find one but it was going to be £40 just for the tank. Buyer was not willing to pay that for a free due tank.