All relevant military objectives can be accomplished electronically these days. Other than China annexing Taiwan there really isn’t a case for securing land or resources in the immediate future that couldn’t be done through more subversive and less overt means. I’m not saying that major land or sea battles are no longer a thing, but they’re less of a thing than they used to be.
Russia is spent. They will not be able to raise another effective fighting force for decades. Europe will not want to be under their thumb with regard to oil, gas and nuclear energy, but those aims can be handled by domestic policy or regime change. Destruction of the Russian state is about the surest way to start WWIII conventionally and end it in a nuclear fashion.
Honestly, your passions are ahead of your reasoning in this matter imoho. There is no ideologically driven, genocidal horde hellbent on world domination romping around Europe. And the Empire in the East is well established with little thought of expansionism beyond that troublesome island. China might look West to a de-clawed Russian state, but there’s simply no need to start a global war. I think the desire to settle all accounts now while we have the wherewithal to do it has some merit, but it’s likely the end of all things if we pull that lever.