It's very weird that most of the racing in GT7 is in such a sorry state, when there's a few very good events too.
The majority of the races are 3-10 minute overtaking challenges, like 80s-90s arcade racers. It worked beautifully in Daytona USA, but that was all the technology we had 28 years ago, and that game has two cars and three events.
The one-on-one Dirt Champions races, that one Tsukuba race with a grid start, and the Tokyo Central 550PP races are events made in the old GT1,2,3 approach; a few AI opponents with competitive pace, often one is the dominant rabbit.
Then there's events with a GT4 approach, still usually one rabbit, and the other dogs have a big rolling start advantage over you (Tokyo600).
But the majority of events in the campaign are most like GT5 and 6; the rabbit isn't particularly fast, but it starts 30 to 70 seconds ahead, and between it and you are nine to 18 pugs, not greyhounds, that know roughly what a racing line is and yet are 15 seconds off the pace. The challenge is only to avoid hitting them as you chase down the leader's huge advantage in a few laps.
You can make closer, classic style GT events in Custom Race Mode with grid starts, which does make me wonder why PD won't. Professional AI in shifter karts is really quite fun!
The Human Comedy confuses me too, it's got hot chilli AI AND extreme advantages, making it by far the hardest thing in the game, and the rewards for what amount to the raid bosses of the game are not worth your time. Machiavellian.