Is oppressor mk2 really required for grinding?

Firstly it's 6mil on trade price for terrible tracking limited missles, no protection, relatively slow speed, and a cool down of it blows up.

If i want to move between businesses, I can change spwan preferences and change lobbies. If I want to get to LSIA I can spawn into my agency and use SUV to fast travel.

If it's something like a gang termination mission, sparrow does it best. If it's something like the slavage yard robbery prep then it makes sense to have the mk2, but for the farthest one you can again switch lobbies till it spawns close.

If it's something to do in blaine county you can get the any plane to fly there. Or spawn in a facility or a house.

The few reasons I think mk2 is good are prep work and moving fast for short distances. I don't know if I'm totally wrong about the mk2 as a grinding tool or I do have valid points but I would like to know if its something to really have for grinding?