That's not entirely true.
There are enhanced featured of JF-17s in the works. Which belongs to which block is what is unclear
Things like:
Twin seater
IRST
Composite materials
Have been speculated about.
Chinese Avionics Advances Ripple Throughout Asia | Defense News |...
We hear both things, Ayesha Farooq herself has not confirmed anything to the media.
Keep trying.
Yes there are risks to being captured behind enemy lines, but I'm sure the people crazy enough to become soldiers and fighter pilots have dedicated themselves and their lives to the country.