The things you mention still require careful planning and use of resources, it's not as simple as bomb anyone from a different room and they'll be gone.
From my experience setting up bomb traps takes lots time and planning, social engineering, with very little return.
For example, lets use the situation of throwing bombs out of cars to get one person then driving away. You still need to find that person to begin with, which- if it's an older combat character, can be extremely difficult. Have a car in the first place, They have to be on the street, get xhelp depending on sector/circumstances. etc, i'm not just focusing on this specific example.
You also don't have to take the risk of being in the same room when you're sniping, but there are still the same risks involved. And especially if the character throwing the bomb isn't good in a direct fight, the risk is much more dramatic.
It will make setting up ambushes against veteran characters more viable and offer more variety instead of just co-ordinating a specific time with a mob and waiting in a spot to get one person.