You are missing the point here, it's not about how expensive the pilot cost to be trained, but rather how big is your available pool of people capable of being pilots is. No matter how one cuts in, in any nations there is only a certain amount of people who are qualified to be pilots, and you can't increase that number by any artificial means. No amount of money thrown will solve that matter. You can try and train as many as you like, but war attrition will see that those numbers get depleted fast.
And I don't see how my ww2 example is irrelevant, in the long term, price tags are always relegated to the sidelines in terms of man power.
Put it this way, the only limitations to a bomber is what kind of materials and effort you are willing to put into it. For a pilot, it is whether the guy is qualified in the first place and how many of those are born and are in the appropriate age bracket for you to recruit. And it is still an open question as to whether the guy would even be a good one.
No, think about it.
China has a population of 1.3 Billion
China only needs in the region of 20,000-30,000 pilots. (The US military has 21000 as a comparison)
Finding just 1000-2000 people per year to become military pilots is not difficult.
The pool of people who are capable of being trained as pilots is far larger than this.
You know that being a pilot is one of the most coveted careers around.
There is so much competition that airlines and air forces can be extremely selective about who they select for pilot training.
So in peacetime, you want to size the air force according to the optimum cost of pilots versus aircraft.
But trained pilots are so much cheaper than their aircraft, and you can train as many as you need, as long as you have 5 years to do this.
In wartime with an airplane production rampup, every air force is going to find itself running short of pilots.
Even if the air force increased in size 10x, it would still be easy enough to find 10000-20000 people per year, who are capable of being pilots. But yes, it will take 5 years to train someone from scratch, which is a problem that every air force would face.
Unless of course, air forces go with large numbers of unmanned combat drones, which is what I think they will be forced to do.
On that metric, China is well-poised to succeed.