To your first points I would say that basing the UI and most importantly the default shortcuts on Photoshop/Illustrator benefits those who come from using them. I didn't have any trouble picking up Affinity as I am already used to a certain workflow and changing that would be the cause of frustration and ultimately would have put me off just a bit. However, not as much as the subscription price puts me off from using adobe products, so there's that. I am sure that the designers of the Affinity products have made that decision quite consciously. That said, the similarities are not always one to one, they managed to fix a lot UI pain points that I have had with AI and I'm quite happy with it. The counterpart tools in Affinity are miles more user friendly and they behave exactly as I expect them to. My point is that you are, perhaps, a bit unfair with your assertions.