Honestly, the F-16 thing is a stupid distraction. These spokespeople need to shut up about it.
There have been a few posters here clamouring for them to be sent over, and I said it was so stupid.
6 months will make them able to fly at a basic level, they won't be able to exploit the plane to the full performance envelope due to inexperience.
NATO is supposed to get 15 flight hours per month on a yearly basis, now you want to compress the number of training hours into 6 months? This is not including classroom and other instruction. It is not a matter of will, but absolute physical and biological constraints.
The time, money, and possibly lives spent on such a project would be a total waste. Far more sensible to continue to concentrate on strengthening their ground forces.
It serves a morale and propaganda purpose as well, to sell the idea that the Ukranian military are these super capable and super motivated people who can achieve the miracle, they just need the support. It also skirts around the idea of "supermen" which we know where it leads to.