Well, that describes nearly every race track in every racing game outside of Rally games.
You already mentioned Shift. Also, iRacing, rFactor 1 and 2, nkPro, Assetto Corsa, pCARS, GT Legends, GTR 2, and that's only the ones I personally own (or owned). (Edit: and actually, F1CE now that I come to think of it rattled the bejeezus out of my DFGT.)
Nearly every track in nearly every non-Rally game is totally false, unless you confine yourself to console racing games.
And you seem to be so overawed by GT5s course maker that you're missing what was done wrong. It was a reasonable concept, a Modnations style track editor is a big ask, and so the GT5 one was a decent middle ground. Except that even within the limitations of what it is, the slider method of controlling what track you end up with is unnecessarily obtuse and confusing.
There is no way of knowing for sure what a slider will do, without doing it. It's purely trial and error. Much of the time it'll do what you expect, but a significant proportion of the time it'll do something completely wacky, or change your whole track.
Leave a "Generate Random" button in for people who want to play that game, that's fine. For the rest of us:
1. Choose a set of nodes/anchor points/sector points. Those are the basis for your track.
2. For each sector, the game generates a list allowable routes. Display said list, and choose the one you like.
3. Track done, have fun.
Far more intuitive to use (you can see what you're getting), far easier to get the desired result, far less time consuming. Is there a problem with this? I don't see that it does anything that the course maker isn't capable of now, it's simply a different presentation.
So to be clear, what the GT5 course maker is capable of is totally acceptable. It can make great tracks, no question. What's wrong with it is the interface. Which unfortunately takes away most of the fun for people unwilling to go through the pain it requires to make a decent track.
It reminds me of James May driving around the Top Gear track in a sleeping bag. Driving around a race track: fun. Driving while in a sleeping bag: fun for about twenty seconds, then it's just frustrating that you can't do what you want to do.