Earlier quoted context omitted.
It would make sense, but different countries have way too different historical experience, cultural ties and business interests. Hottest examples - Russia/Belarus/Ukraine, Greece/Turkey, Nordstream, the whole migrants-in-Mediteranean thing and so on.
Differences in culture are addressed by endless amount talking, compromises, etc. Previously Europe often resorted to war. I highly prefer the current attempt at trying to keep peace. Promoting peace is listed as a goal on https://europa.eu/european-union/about-eu/eu-in-brief_en
What if Germany and France decides to go for endless talking and compromises to Russia, giving away parts of eastern europe as part of the deal to keep peace?