Let me answer your question with a question.
Brazil ALREADY had a catapult carrier now, does that mean they have bigger World stage influence than India and China combine??
As i said, and you quoted, you can do whatever the hell you like with your money, you can get a catapult carrier now, or you can get 12, China have the means and money to build it, just what are you doing to do with the one or 12 Catapult carrier with? Beside running up and down the chinese coast before 2030??
There are PROPER ways to train up to what you want, there are STUPID way to train up to what you want, my point being, China should wait until the first catapult carrier to induce J-15 with it, not to running it half-arsed with a ski-jump carrier. What are you going to expect from learning with plane running half of whatever it should be??
As i said, you fork the bill, you can do whatever the heck you want, even if that means you are wasting your own money, hey, that's fine by me