I doubt many would see a reason to your arguments because most here are too busy repeating themselves into oblivion over what is a grossly inaccurate flawed representation of a number.
While numbers are indeed low I would say they follow pretty much the trend of every patch cycle with the outlier being the time when we had Covid and people had nothing else to do so naturally the numbers were much higher. If you do look at the chart you see the same dips in numbers every single time for every single damn expansion.
Also patch 7.1 hardly had any content. Is the game in trouble? We shall see with the 7.2 more accurately when long-term content gets dropped.