As people mentioned, the cars in the game need license fees for company to use them in their products. I do have another thought, why do game companies need to pay car manufacturers, but not the opposite way, or why not they be equal. Well, there must be people who brought the game because of the cars. However, in my case, I brought the cars because of the games, and I believe I must not be the only one. After watching hours of videos of gameplay, I get to know many cars, their history and background, and showed interest. Last time when I was not able to buy the One S FH3 bundle, I eventually brought a real car instead. This time the new console all sold out again, Series S/X , I end up buying more real cars. If not the game I wouldn't buy them.
Realizing Horizon 3 is gone, it's pretty sad. I always thought I could play it one day after all, just the matter of time. But now, I think I may have to give it up. But let's move on, the next Horizon game will always be better anyway. By the way, I buy scale models and I'm sure some people do buy the real deal.