I'm trying to keep an open mind and engage with people who don't agree, but you're not making it easy for me here.
You're suggesting that when Russia cut off the gas, and Germany didn't immediately capitulate, that's evidence the leverage was worthless? It wasn't even winter yet.
Also, blowing up your pipeline just as a competitor comes on line? Whatever you think of Hersh's article, it's undeniable that Norway made a lot of money on the sabotage. Even if Russia had stayed firm and sent no gas through the pipeline, the fact that they could have alone would have kept prices lower.
Third, you're suggesting that Sweden/Denmark would have kept it secret if they found evidence of Russian meddling? They absolutely would not. In fact, if there was even evidence exculpating the US, without implicating anyone else, they would have blasted it to the heavens.
NATO-aligned think tanks have gotten better at this - something I view as a good thing, despite that I am not a fan of them, and I don't think they did it willingly. But with the rise of Bellingcat, they're now routinely publishing embarrassing material on Russia that they would have LOVED to keep secret as a bargaining chip, in earlier decades.
In fact, if there was a Russian team that blew up the pipeline, they would have left a trail a mile wide in public data and the countless leaked databases (another huge one just a few days ago, from Roskomnadzor). Bellingcat, or anyone interested, could have given you their damn cell phone numbers, if it was a Russian op. Yet they have instead remained utterly uninterested in the question of how the pipelines were sabotaged.