Right. Well they're asked now and been asked for over a decade do make a change. Bringing up what happened decades ago is not a good excuse.
I can understand encouraging NATO allies to avoid duplicity and focus more on land power in nations closer to Russia and naval and air power in nation farther from it, or to avoid duplicity in capabilities built for the alliance and not for one nation. But the general structure of an armed force that is sufficient for independent or cooperative defense with a minimized alliance, is not something I'd logically consider discouraging.
In the end, the UK also has something of a ground army. And Poland has naval and air branches.
NATO is a large group of skeletons, who have been strongly encouraged to spend more on their defense. The US isn't going to tell any NATO member not to buy tanks, planes, or ships, nor is it going to tell anyone not to build factories or recruit more soldiers.
What I seeing now is a US encouraging Europe to rearm. That I've seen for at least a decade. I am seeing a US shifting gradually to the Pacific but regional allies seemingly make no meaningful steps to prepare.
Israel is often criticized for being a security burden on the US, despite probably being the least burdensome ally of all US allies. And Europe for some reason is pissy about being asked to pay the bill.