Yeah right!
You only say that because you know that what you are playing does not exist in real life. If you didn't know different, you'd be as happy with fictional courses as you are with the real life ones. If you were so beat up about courses based on real locations, you would not be happy because they really are not like the real locations at all - just representations of. So, what does it matter if the track exists or not as long as one has it's own challenges and qualities?
So you'd would be okay with PD putting fictional car manufacturers and brands in the game then?
We want real cars, why not real tracks? Fictional circuits just come across as artificial, the details are there to give them false character, they're almost a bit gimmicky - like PD could never have come up with the mulsanne straight - oh no, they'd have had a bridge and a tunnel along it! a few examples of things that I find slightly jarring and unrealistic..
Trial Mountain:
Two tunnels, one of them quite long... how many millions of tons of rock would have to be excavated just to build a race track... would never happen, not to mention the safety aspects. Also the trees, road coures don't tend to have trees and branches overhanging the track. And also the tight corners with no visibility and huge 'un-armcoed' jaggedy rocks -- not un-common for rallys, but not likely at a circuit that would host races.
Grand Valley:
Again with the tunnels. And also, it's unlikely a road course would necessitate the construction of a huge bridge to race across (same goes for HSR)
Midfield:
Tunnels! Circuit builders don't look for large lumps of rock to try and build racetracks through...
Deepforest:
TUNNELS!
Red Rock:
TUNNELS!!!
Don't get me wrong it's not like these actually cause a problem in the game - but you say I wouldn't know any better.. I disagree, it's the subtle things you notice.. like, you wouldn't expect to see a Ferrari Enzo spin up it's front wheels on the start line - or a boost dial on a stock M3 would you?
I watch a lot of motorsport, I love the circuits... I see a GT-R GT500 tearing round Sugo in the JGTC and I want to do the same, not jump in the GT-R and go tearing round an imaginary enchanted wood admiring the pixies and the elves (or the tunnels)!
There are hundreds of tracks around the world, without even resorting to the big name tracks... I don't see the need for fake tracks.
This is just my opinion, I don't expect everyone to agree, but I genuinely don't think you can argue that it'd be any different to having made-up cars.