First: Gas is gonna stay reasonably valuable for Europe in the near future, even if electrification of personal transport progresses very quickly.
And there are tons of other valuable ressources Russia has: Nickel, copper, aluminium, steel, ...
> And Russia as a whole will need to pay serious reparations.
I don't see that happening at all. Who is gonna enforce that? Ukraine would be happy enough if they just left.
At the same time, much is made of various sanction packages, which are minuscule in comparison to these flows.
In other words, the EU finances the bombs that will be falling on EU countries in the future.
BTW, Russia will never pay any reparations.
Nowhere near fast enough. The number of senior businesspeople who'd sell out the Baltic states in exchange for cheap gas is far too high.