Above is a key point. We are not under any credible threat of invasion.
As if the "threat of invasion" is the only point on the spectrum of conflict to consider. Its inane to dismiss our defencelessness on a point that is essentially irrelevant in the context of Ireland's defence policy (current and future). Not least to justify the status quo of our tacit support for the Russian invasion (Germany buys their gas, we make frowny faces and wag the finger).
Focussing on food security and energy security don't exist in isolation. There are all interdependent and ignoring one aspect (defence) can render your other efforts meaningless. For example, your energy security is only as good as the security of your infrastructure, digital and physical.
It works the same when we focus on our own "self-interest". All sudden everyone else focusses on their own self interest too. That's the world of mé féiners. Those people and polices offer nothing and have delivered nothing towards Ireland's success up to now, and will not in the future. While everyone has their own national interests, we participate in structures that cooperate on issues for collective benefit. Why is Defence so different?