I only got my first new
car when I was 30 and began my 17 years and counting in various locations around the world. OK, it was a MB 190E 2.3, and ever since I've had pretty nice cars. I did own two BMW's, a 5 and a 7, before then but they were both used.
When I was 16, I was riding around on a bicycle, not riding around in 30,000 - 40,000 dollars worth of fine machinery.
But regardless, if parents can afford that for their kids then that's ok. I can afford to buy my son a BMW, or support him until he finishes university and finds a job. Not both.