Yes but how many of those scoring punches helped to establish control of the fight?
If I spend 12 round against you pawing/proding with my jab (this is just an example I'm not saying that is exactly what GGG did) and you spend 12 round against me teeing off with power punches but landing less of them then I do with a pawing jab, the stats will still show me having thrown more punches and landed more, it doesn't however tell the story of who controlled the action as my face might tell its own story.
My point is thrown and landed punches in itself is simply a way of counting punches, it doesn't give you a sense of the quality of those punches and the effect they had on the fight. Power punches landed as well as actually watching the fight tells its own story and this was not a dominant GGG performance. Canelo controlled the majority of the fight with smarter more educated work.