And join just about any current sport mode race and you will see the evidence of people that are after multiple lap attempts in Qualifying they are finally able to put together 1 decent lap but once in the race they cannot consistently run or maintain that pace.
There is a lot of difference in being on a track by yourself and taking 20 or more laps to finally string together 1 decent lap than being on a track with 19 other racers and need to turn close to that same time over a course of up to 10 consecutive laps and also take into consideration of accounting for less grip because of the tire wear that is active in the race.
That lap time not only sets your starting place but indicates you can run in a race at close to that pace lap after lap if need be.
So they are the ones in the race trying to run over their heads bouncing off walls and coming back on the track taking out other racers, blowing braking points and running through corners taking out those that have used a proper braking point for the track and pace being run.
They have not run the track enough to understand how a corner will affect the car because the optimal line is already taken and forcing a different line because of traffic.
Yes there are people that intentionally wreck people but there are in my opinion many more that are trying to drive at a pace that exceeds their current skill level who are causing the most problems taking many racers out not on purpose but due to lack of ability.