Because I was looking at more than just 1 point of data before coming to any sweeping conclusions and the August data tells a very different story than the one you are trying to sell.
That also 2 issues in a month also... your original claim was that it was going down in-spite of the event, now its suddenly an excuse? That looks like you're changing the goal posts.
Thats only 2 months of data and did you look at what else was there? In August there were 4 Batman titles, The 3 Jokers and Dark Knights Death Metal. Context Matters.
Thats not evidence, thats anecdotal utterances at best, unverifiable and which retailers? You're local comic shop? Comic stores in New York? California? Europe? Also point of order; the "Start" was HoX/PoX which did really really well.
Digital Sales, recovering markets and demand as a result of worldwide lockdowns and a global pandemic... Yeah maybe there are other considerations.
There is also the fact that you are making judgements on the overall success of the line by judging only its weakest selling books. Your argument says "Oh look these two books are underperforming (based upon criteria that I don't fully understand and that predates the pandemic) therefore the whole thing is a failure."
In point of fact there is no significant evidence that the overall line or Hickman or his "Hickminions" are in any danger at all. Maybe one or two of the books are on the chopping block, but so what? Thats like arguing that Batman is in danger because Batman and the Outsiders is ranked at 126 and Red Hood Outlaw is at 136.