Just because it was the right decision doesn't mean there are not downsides.
Edit: there was never any chance of Germany invading Ukraine then/joining Russia on any invasion.
Politics often are about the unintended consequences. Often they are also unforeseen.
There are consequences for it that though.
However it is still correct. If Germany had joined Russia (and got away with it!), there is every reason to think the pipeline would still be flowing.
Of course if they had done that other countries would likely object and so we can go on and on with what could have been (for starters the propaganda would be all different). There are no easy answers and we can never know what would have happened.
However we can still discuss what would have happened if they did.
During that time Nord Stream was blown up.
The point is moot, since Putin has offered multiple times to open the remaining intact pipe:
https://www.reuters.com/business/energy/putin-urges-germany-...
And the broken pipes can be repaired, as was determined in the LLoyds lawsuit recently.
I'm not saying that reopening would be reliable, but it would be one diversification away from US and Qatar dependencies. The US just cut the EU off from Qatar gas.
This was spun as a Russian decision, but western countries were clearly trying to force Germany's hand.
The gas was never cheap, either; apart from the money spent now to restrain the military buildup and invasion it financed, even at the height of supplies it was much higher price than China is paying, a price sustained by Russia using military force and more to restrain other (Asian) countries from supplying to Europe.
(This was obvious to everyone, right? A single majority supplier nation state charging a cheap price out of the kindness of their heart? No, of course not; neither cheap nor kind. It was a monopoly, built on blood.)
it's a little rich to accuse them of playing games with gas after the stunt Canada pulled and most especially after a western partner subsequently blew up the pipeline and blamed it on Russia.
Clearly certain western allies decided that Germany couldnt be trusted to make its own decisions about where Germany gets its energy.
If you want to see their approach to maintenance while prices and needs are high, watch them put oil refineries back in operation days after drone hits.