the reason that canada was the leading voice for the rule of international law through the second half of the twentieth century is because it realized it had the most to lose from the order collapsing; the threat was existential, and well understood - both from the americans to the south and the russians to the north.
canada would be the first to go, if the system ever fell apart.
so, when chretien held to this position - until the day they dragged him from his office - he was holding to a position rooted in a very deeply held view, of an international order that was of his party's design, for his country's survival.
it wasn't a triviality.
and, to suggest it "wasn't worth it" is about the most ignorant thing i could imagine somebody possibly saying.