Not today, champ; one World Cup won't crown Ronaldo the GOAT over Messi. I float like a butterfly, I sting like a bee, greatest of all time, that's me.
One World Cup is just a datapoint in Ronaldo's long career, while the GOAT is the full dataset of goals, assists, consistency, and impact, and one trophy can't rewrite the entire model.
One World Cup is just a gear; the GOAT is the full engine of decades, craft, and influence. Messi built that engine long before Ronaldo lifted a single cup.