Well, think you're only seeing the most splashy uses. For instance, at high speeds, could use the thrusters to first, increase acceleration and speed, and second, have them also able to do a bit of thrust vectoring to help push the car's tires on to the pavement for better traction. And then on turns, have thrusters firing to help push the car into the turn.

Also, maybe the car is able to hover for short to medium distances, which for a military and offroad vehicles, could be very useful to cover all types of terrain

May come in handy if someone blocked your car on a parking and you don't have time for the tow truck to arrive. Or when you're stuck on I-95 during a major snowstorm.

Yeah, I mean how are you even going to get a family of seven and a dog in there

Let's get real, the entire point of a roadster is to look cool and have good sensations. Try to beat that!

If you want a sensible car, get a Toyota Corolla, or a Model Y if you want to stay with Tesla. They will get you to your destination just as well for cheaper and with more space for your stuff.