TIT. This ain't the West, this is definitely not Canada, and never will be.
Dragging your Western concept of fairness and judicial sanctions here with examples of Anglo-Saxon-French "This Is How Canada Does It" equates to - zero, zed, nada.
This Is Thailand. <period> The police are not adopting Western standards. Not in my life-time. Probably not in yours.
And personally. I'd rather live in this country with a rather lax enforcement model than in Canada with is nascent authoritarian police state where the answer always ends up as throwing citizens into court with heavy fines and prison-time which are disproportional to the misdemeanors.
That is one of the reasons I live here. To get away from the heavy-handedness of over-zealous policing, so-called justice, and the infernal bureaucratic regulations with their own enforcement nonsensical fines. I detest nanny-states.
Canada is on one end of the extreme law-and-order authoritarianism spectrum and Thailand is on the other.
Honestly - Somewhere in the middle is the better approach.