Oh, some Europeans get it. There have been multiple attempts to implement it. Unfortunately, arguing over details by multiple countries (both politicians & armed forces, focused on budgets, industry, or their oh-so-special, utterly unique, requirements) tend to get in the way. So, you get an idea for a helicopter, or a frigate, or whatever. But it turns out to be a family of unique national models, mostly built in small numbers, with local equipment.The Chinese (and the Koreans and Japanese) have all recognised that production can be rapidly mass produced if you focus on a few common platforms, don't chop and change all the time, and build them in batches for upgradability. The Americans also understand this (mostly). For some reason the Europeans and Australians are yet to figure this out.
And these days, no one European country, or Australia, makes enough of most things for such a common platform to be built in sufficient numbers just for that country.