No, I think it presumes that given the Mozilla Foundation's mission, if a browser-focussed Mozilla Corporation is no longer viable, the parent Foundation has utterly failed, and neither it nor the Corporation that supports it has a reason to exist.

Now, one can argue both sides of that, but I think there's a very good argument they the center of the open consumer internet is the browser, and that soloing functionality off of that (even if the particular thing you are promoting happens to be an open solution) ends up just reinforcing the trend toward balkanization of the internet into domains of disconnected functionality mostly ruled by proprietary apps and services.