That is an absolutely loaded take. You CANNOT point to any one feature and say “THAT is the reason wow declined” because the topic is Vastly, VASTLY more complicated than that.
I could point to the decline in reported pirate attacks and point to the increase in reporting of people in cancer and say “because we have less pirate attacks people are getting cancer” when in actuality it is just due to the fact that around the end of piracy, medical documentation was getting better…
This argument is constantly re-use but it such a TERRIBLE use of statistics.