there is no solid reason not to purse dual AC construction strategy.. glad government has taken the right decision.
when you accounts 50+ percent global shipbuilding capacity and abundance of skilled workforce. go for it once you master the specific technology.
Given the relative difference in shipbuilding capacity (>200x difference in civilian shipbuilding), I'm surprised at even just 2 concurrent aircraft carriers being in construction.
In theory, China could produce many more ACs concurrently. I personally believe the reason they're not doing that is because its still in the "advancement" phase of military development rather than the "bulk-up", in that each new design that rolls off the manufacturing line is partly a finished product and partly a demonstrator for new technologies. Once the PLA has settled on a mature design, then they can start mass-producing clones.
If the rumours are solid, then we're looking at the dual construction of a novel CVN as Type-005 with an improved (but still different) Fujian that would actually be a Type-004 to Fujian's Type-003 in the same way Shandong was Type-002 to Liaoning's Type-001. Then once the designs are finalised, they'll mass produce identical copies of the Type-004 CV (likely for homeland defense) and Type-005 CVN (for global power projection) at a rate of perhaps 4 ACs concurrently, if not more (depending on how much they want to ramp this up).
China doesn't have infinite money, but the actual industrial capacity is already there. The technology is lagging behind the industry.
Of course, this is all speculation. Only time will tell.