Really?... GT doesn't focus on the sport of racing, yet Kaz races the Nurburgring 24 Hours and GT Academy puts gamers in real race cars. Yeah, GT doesn't focus on the sport of racing at all
If you REALLY need an explanation on how flags, a pace car, and podiums would work on a 10 lap Miata race, YouTube a Skip Barber National MX-5 race. I worked at Skip Barber, trust me it will show you exactly how.
By saying "go play such and such a game if you want that stuff" is EXACTLY why GT is in trouble. The games like Forza, F1, pCARS that have this stuff are GT's direct competitors. People WILL go play those games instead if PD doesn't wake up. That's the point! You've obviously not gotten what GT does, because racing IS what PD does.
GT is a RACING game. Besides graphics, GT has always boasted the most realistic physics of any racing game on console. What we're talking about here is additions to the racing to make it more realistic. If GT was just collecting cars and driving them around with no way to tell the difference between cars or racing them against each other no one would play GT. By your account, GT wouldn't even need an online mode if all people wanted to do was "grab a car go on track and do as many laps as you want."
The best part of your post is "our unrealistic and stupid expectations." Unrealistic? No, not even close. If smaller studios that have far less development time than GT can accomplish these features, PD has no excuse. Stupid? Yeah, wanting more realistic immersion and features that will better and advance the game is stupid...