The encouragement factor is a byproduct of the action - it does not define why it is essentially wrong in the first place.
It is essentially wrong in the first place because:
Roads are by their nature populated by a variety of dangerous vehicles from cycles to juggernauts which put users of other vehicles and pedestrians at risk.
Relative safety is ensured by a system of rules that ensure, among other things, a reasonable degree of predictability as the the likely behaviour of other users: Behaviour within the rules is, in normal circumstances, safe and behaviours outside the rules are less safe and potentially put other users at risk.
Anarchic behaviour by random individuals choosing which rules to obey destroys the predictability and potentially puts road users at higher risk.
ie RLJing is wrong in principle not because it is against the law but because it disrupts the saftey system making the roads more unpredictable and less safe
There is a whole different argument about what rules
should be set as to priorities and duties of road users at light controlled junctions eg left on red, or flashing amber at night on some junctions. But, whatever new rules emerged from that argument, the point would remain that anarchic behaviours such as RLJing would be outside the safety system
