I see your point to some extend, especially if you compare Arty’s artillery to the molotov, but the air airstrike marker is often a “pop out and throw” ability as well (fast deployment even if slow to arrive), so from an activation POV it’s not that different from the molly, no?
In any case, my beef is really that I would like all abilities that drop support goodies on the field to use the same bind. Makes no sense to me to have ammo stations on a different bind than health stations.