To preface this, I do agree it’s not morally correct to pirate. At BEST it’s morally neutral, and usually it’s not even that. I don’t know why people think they’re entitled to another person’s work without paying just because it’s “art”. They’re not.
However…
I completely disagree that your analogy is spot on. If I have zero plans to ever buy a certain car, but then one day decide to just steal it to see if it’s fun to drive, that car can no longer be sold to somebody else and the dealership or whatever just lost a lot of money.
On the other hand, if I have no plans to ever buy a game, but decide to pirate it to see if it’s actually fun, the developers don’t lose money from that. I never would have bought it in the first place, and they can still sell it to others because I didn’t actually take it from them.
That’s the difference. Now, if I had already planned on buying it but decided, “nah I’ll just pirate it instead”, then I would agree they’re losing out on a potential sale. That’s still different from losing a car though, because the dealership isn’t only losing a potential sale, they’re also losing an item in limited supply that takes physical time and labor to make (as opposed to just fabricating another Steam key).