I do agree with your core idea and yeah we should work towards it, but in the meanwhile we cant ignore current reality either. It will take generations to unroot car centric worldview towards public transport and more people centric worldview and building said infrastructure takes time as well.
In the meanwhile there are people who ignore rules for their own benefit or just not caring and threat of an imminent punishment does reduce the amount of rule breaking until we can get to the society where the punishment is no longer necessary. Yes it's not perfect, it's just a patchwork solution and the efficacy of it can be questionable.
Like the current subject of full on surveillance camera is probably one of the worst and most exploitative ways to get the desired results, but at the same time. It can be rapidly implemented and will scare some people into more careful driving even if just around the bus. Though i assume there probably are some less invasive methods that can be rapidly implemented and will have a similar results, if even necessary at all as i don't have the data regarding how regular this occurance is.