I strongly disagree, the fictional tire barriers are just a very lazy way of dealing with corner cutting. Other games seem to do just fine without that nonsense when they use for example penalty systems if the track position / track time doesn't match after going off track. Turn 10 decides to go the cheesy way of dealing with the problem.
Not only do the fictional track barriers ruin the look and feel experience of a circuit (VIR for example supposed to look like a golf course instead of an old tire junkyard), they are also very unrealistic. In FM6 I preferred to race with simulation damage on, the slightest contact with the AI cars can bump you into a fictional tire wall which results in... game over. It's really frustrating to ruin your car against a tire wall that shouldn't even be there in the first place.
I'm not a fan of the superglue grass from FM5 either. Whether it be tire walls or sticky grass, the motion of the car should not be altered by any corner cutting measures, period. They should implement a proper penalty system. But they choose for the lazy way out, like with so many other items in the series (only 90 degree steering wheel animation, no FOV/seat positioning, no VR on PC, no 'real' car assists, no proper car classes, ...). Turn 10 has some quality programmers in-house, no doubt about that, but the people above them who make the decisions need to be kicked in the asses for being so lazy and uninspiring.