He can but it’s not a huge issue because the countries that want to act can do so outside of EU structures, which would be necessary given the UK isn’t in the EU.

EU needs a new structure for taking decisions.

There is an alternative structure - multilateral agreements between nations, ignoring the EU entirely.

That would be a good idea, indeed, at least for military matters.

It would eliminate the "Orban" problem.

Yeah, good luck with establishing that. The 27 EU member states are still separate sovereign nations, and nationalism has been on the rise in recent years.

Wars are exactly what’s establishing things like that.

You’re referring to the nationalism I presume. That’s true, but it doesn’t help the overall situation, unless you believe that we should just let Putin do what he wants with Ukraine.