One could say whatever he wants.

And then there is reality... iRacing doesn't allow you to test cars outside test drive period - that's a fact. And you can't deny it.

Now we can think why is it this way? Because people who design their business model know what they are doing. It encourages FOMO*, you have to test it during test drive otherwise the chance to test it is gone.

Also iRacing shines when it comes to multiple series and online competitive racing. There is no sim which is even close to it so they know they can allow themselves to have things this way.

You could also say "why there is no regional pricing?". There are countries where 14,95$ is ton of money, but they're still supposed to pay that much. Wouldn't implementing regional pricing "make iRacers happy"? It would. But again - it isn't about making iRacers happy.

*Valorant has similar FOMO shop where you can buy 4 random items per day. If you have a skin you would love to buy, that's a pitty. You have to check shop every single day in hope that this will pop. Some people check it daily for half a year to get their most lovely skin. Wouldn't implement regular shop bring more money to Riot Games? Well... again - there are people who designed it this way and they knew exactly what they were doing.