I don't understand what you said in the last sentence. But again, I just said it was full predictable knowing the limit of the console hardware and their engine.
I think they meant to say that the current-gen consoles are a known quantity and likely have been to Bethesda since late 2012/early 2013 (maybe even before depending on when they got dev kits/learnt about the specs). As such there's no excuse for them developing 2 games now that fail to run at even a relatively stable 30fps.