Just as a remark, it's an interesting indicator of China's own estimation of both its current capabilities, needs, and international political landscape.Of course, it makes no sense for China to do so. The point was merely to illustrate that China has the capacity and capability.
Because Liaoning class can indeed be produced right now at the necessary tempo - it's already a known quantity, it works, and they're already "producing" necessary personnel on the first two carriers.
Yes, they are in no way supercarriers - but they're carriers nevertheless.
003 has a long way to go ahead of it right now - and it's clearly viewed as acceptable.