> If we slap red cross symbols on people with medical equipment that you see in video games, it'll just dilute the meaning and maybe next time someone sees a vehicle with the red cross symbol they'll think "oh, that's just the enemy's medics" and throw a grenade that way.

The red cross is used by the enemies medics. It's one of main allowed uses.

The issue comes with a distinction not commonly used in video games, true medics using the red cross as a logo are designated non-combatants, while they are armed they are only to use their weapons in protection of themselves or their patients and under no circumstances are they to directly engage in offensive military operations.

It's also part of the reason why combat medics in the US no longer use the symbol, without it they can act offensively

Also the Taliban have no qualms about destroying an ambulance or shooting a medic.