I think it's just because they have an idealist view of what "better trained" is that doesn't account for that, if you aren't trained for what you are actually doing, you aren't better trained.

Training must always be considered relative to conditions, like evolutionary fitness. We can say that humans are "more evolved" than the Leedsichthys (a prehistoric fish) because they have a longer evolutionary history, but that doesn't mean shit if a human and a revived Leedsichthys are in a diving competition.

Likewise, the portion of training Ukrainian soldiers got that depends on assumed air superiority is literally less relevant than Home Ec cooking classes they might have taken.