This is very unlikely. Russia loses way more from this war than if Ukraine would also sell some gas.Indeed, as the Good Friday Agreement shows. I don't think any of the involved parties in Northern Ireland view it as ideal, but rather as a compromise that they can live with, as evident by that it has been quite calm in Northern Ireland since its establishment.
Why? Good question. In today's economic paradigm peace, stability and open borders benefit us all. What flag is where is less and less important. As long as we have peace and stability, all is good.
I don't think Putin is waging war because he is after money or resources. To recreate the Russian Empire (and it is the Tsarist empire, not the USSR, that he fancies) is his life project. It gives his life meaning in the same way as, for example, being an environmentalist activist gives meaning to Greta Thunberg, or working to advance liberal democracy gives meaning to George Soros.There is no benefit of having an empire today. Today's empires are corporations. Not countries. The richest men today are all industrialists. Not emperors or presidents. Putin just didn't get the memo.
I think the Ukraine war is about the newly discovered natural gas reserves in Ukraine. Putin had a near monopoly on selling gas to Germany.
What a surprise Putin only wants Luhansk, Doetsk and Crimea. The areas with the gas deposits.
I'm pretty sure this is the sum total of the reason for Putin attacking
Putin's ultimatum back in December 2021 made it clear what it is about: Geopolitics. Putin doesn't want Ukraine to leave Russia's sphere of influence.
It is for the same reason that they attacked Georgia back in 2008. Georgia was getting too close to the EU and NATO, and moving away fro Russia's sphere of influence.
You are thinking about this is in an overly Marxist way.