I do, and your arguments in this thread don't convince me at all. Is there something incorrect in my comment? Developers went from having one payment processor that charges 15%/30% to many payment processors that can charge as little as under 3%. Revenue-wise, there is no downside to having these additional options.
I don't know if your money works differently from mine but for me I get to own the difference between Cost and Revenue. Revenue increase is not good if the cost increase is higher. I doubt that the revenue will increase, the costs will certainly.
The costs consist of my time and the payments I make to build and distribute my stuff. This will reduce the costs that I pay to Apple but will increase the development and legal burden.
"We wouldn't need to spend money on cleaning staff if everyone clean their door front."
Yeah, sure.