Can we please treat entering a vehicle just like climbing a ladder or opening a door?

I look at a car and the action says get in, it doesn't say drop the weapon/item i'm holding.

Items in your hands at time of entering car can just disappear like they do on ladders and reappear in hands when exiting.

Do the same for items carried on shoulders and we can do away with the clownish nature of long guns and shovels sticking out through the top of a car roof ;)