I've not watched, so I'm going off what you say here...
Having watched a few S/S rated guys on their twitch channels all I ever notice is that all they do is fuel save. Rarely do I see them go for it and try to overtake. Not saying they can't but tactically it's better to sit behind in someone's slipstream and overtake them in the pits.
See, now that's the thing... folks are comparing this to real life, but, in real life road course racing, no one sits and slips streams lap after... if they have the pace, they go... sure NASCAR play this game, but it has more to do with track position/team mates/drafting partners than it does actual saving fuel, and, even when this does take place, when the lead cars come in for fuel the entire field does... as the fresh tires are going to allow the leaders to run away...
In game, fuel is very exaggerated, and slipstream is far too strong, then, you have cars that can run at race pace short shifting.
I believe races are too short to be implementing fuel/tires at all... and the only way to force the issue is to make consumption so unrealistic that the strategies used follow suit... unrealistic.
Races should be long enough that a pit stop is a requirement.
Run hard at the start, punish the tires, pit early and conserve tires/fuel...
Conserve tires/fuel, pit late and run light on fresh tires...
Run predetermined steady pace, pit mid race and stay balanced...
That would present strategy...
Pit or don't... that's not strategy, that's playing the odds... 50/50, flip of the coin, yes or no... it's not strategy... not in my opinion.
Again, races are far too short to implement pit stop anyways, so, it's frigged from go.