If your training assumes conditions that are counter to the situation, you don’t have superior training in anything but a highly idealist sense. Training is essentially ingraining in the trainee an algorithm of responses to different scenarios and the ability to reliably execute those responses. If someone is trained to be a world-leading expert in archery-based warfare in tropical rain forests (and just that), characterizing them as “better trained” than a Russian soldier in the context of this war is about as true as saying that a boxer or even a chef is “better trained.” We can theoretically say that there are things that they have more extensive knowledge on than the Russian has on military tactics, etc. but that training has very little actual application and the Russian’s training is completely applicable.