I think the training in the west is extremely focussed on tactics in netcentric warfare. It is no longer the real dogfight but the node... It is better to train that on computers then go up in air with that many planes. Pakistan has not been part of that development and kept the local need of a2a proficiency high. Certainly with the lack of BVR equipped fighter jets.
The aim of USAF is to have air superiority in all imaginable scenarios in any region of the world and that too on short notice. They also have a variety of numerous assets available to them via which they can perform all imaginable missions. With this much of workload it is not only necessary to hone your piloting skills but also train to utilize all that available strategic assets to their effective and maximum use. For that simulators is the most effective way to go.
PAF on the other hand has only one major enemy which is right next to us. So our doctrine and work is cut out for us and focused on India only. However, now PAF also possess AWACS and is taking the C4I capability seriously to respond effectively against IAF misadventures. It is good to know that PAF has invested in the Electronic Warfare Tactical Training Range and is taking this aspect of the warfare seriously.