Personally, I don't care much whether there is a pan-EU force or national militaries (tied together by both the EU and Nato) that fills this role, but I see it is a problem if Europe lacks the strength to properly defend countries such as the Ukraine. If Putin is, through military aggression, able to eventually gain full control of the Ukrain, I expect other "leaders" with similar dispositions will try similar actions in the future.
I imagine these days it's a little better, but it's still a bit of a magnet for the hard right in germany, for all the obvious reasons.
[0] https://ctc.usma.edu/the-insider-threat-far-right-extremism-...
PS: I think in general it's germany's ongoing far-right problem that makes nationalist-adjacent careers and institutions far less attractive to normal people, so it's sort of a vicious circle.
I would be more of a fan of a pan-EU force than a return to traditional national militaries.