The threat to "our" interests is clear; Putin is not interested in any international agreements/common decency in his desire to achieve his aims.
Do most Western countries , per se, give a flying f#ck about the Ukraine? No - Canada does because we have a lot of ex-Ukrainians, but most don't.
How is the Ukraine relevant then? Western countries may no longer assume that the current 'Intent' factor is relevant in Threat = Capability + Intent. Intent can change in a moment and Putin has clearly no bounds on his 'Intent' from a moral/legal standpoint.
Thus, Western countries should remove the geopolitical bounds on their possible actions. In simple terms, they need Armed Forces which are capable of a response should it be necessary (i.e.stronger than now), and less economic dependence on Russia (e.g. not dependent on Russian gas supplies).
The Ukraine may not be important for most, for now, but what options does the West have when Putin picks on somewhere/thing that is important?