Presumeably I either built the car or paid for it. Either way I worked for it.
The "car" in your scenario was not stolen, it was copied, or reproduced.
So it's not stealing if you copy it. Got it.
There is still value in the reproduction; same cost and value as was put into the original.
Actually, same value but zero cost on my part in this analogy.
Same with songs and software. They cost money to produce and to market. Why should they be allowed to be stolen?
You just corrected me, saying it wasn't stealing it was copying. See line 3 above.
Same thing. You write a hit song and see if you like free downloads vs. actually selling your song. It's up to you.