Yes, good point. I was thinking as I was writing that it isn't exactly the world wars, something like the leadup into it and through the interwar period. I was more thinking of the post-industrial revolution in general, which was associated with tremendous societal change in general, not just militarily speaking. But you're right that the idea of a uniform "Victorian" period is a little weird and/or misleading.
I don't know why the English-speaking cultures are so quick into reducing it into "Victorian", but it was recognized as a time of quick change.