Not just you calling it that, honestly I don't see any issue calling it that, it's an easy way to define it seeing as there are now 3 visually different ships with the exact same registry number (original, refit and reboot) ... Not to mention 1 alternate universe version where the only visual difference is the registry being "ISS" instead of "USS" I suppose there is "shipping of ships" of sorts, it's called kitbashing, basically you just slap together the bits from one ship onto the other.
It's people that think they are superior simply because they don't show an interest in the romantic side of fiction that make me not want to leave my house. I don't really ship anyone either and that's perfectly okay. Nobody says you have to. But honestly, shipping is absolutely harmless. The only exception to this rule in my eyes is when it glorifies unhealthy relationships. Besides, both the characters and those spaceships are fictional.