I don't know this to he the case in any racing game.
There's a lot of room between "no customization" and "totaly unreal customization"
I think PC would benefit from having some customization. Being that they hand you the cars it kinda makes them feel expendable or not important.
After racing most of the tracks I've lost interest in the game. Without that constant goal of buying/customizing new cars, I just don't see a reason to go back.
I haven't seen where there would be that kind of customization in my career. I went from karts, to superkarts, to GT3. these are classes without a lot of room for 'upgrading'. and like I said, you race for a team, and don't even own the cars you race
to be clear, there is "customization" as far as tuning, choosing your tire compound, and such. and some cars have various colors/liveries to choose from
honestly I've found the progression in the career mode quite addicting, and I put Wolfenstein TOB and Invisible Inc on the back burner because of it