I agree with your idea.I am of the opinion, articulated here previously, that China should produce a further three conventional Fujian-type carriers at short (3 year) intervals, in order to arrive at six operating carriers at relatively low cost by 2035, which is not to say that I think China will do this.
Diesel powered carriers have a lot of utility value, especially in a defensive war.
In a possible future confrontation, China will be playing defense, Not offense.
I do not doubt China's economic and engineering capacity to build nuclear carriers. However in today's uncertain geopolitical climate, a shooting war might start before China even gets a chance to Lay the keel for its first CVN let alone commission one.Nonetheless I do think that nuclear-powered carriers both should be and are likely to be in PLAN's future. The question, as you say, is when.