Things being a talking point doesn't mean they're untrue. The US is and was the only party that made any logical sense, to say nothing of also being one of only a handful of nations with the technical expertise to do so as well. The US was against the Nord Stream from the beginning because we felt it could deepen ties between Germany and Russia, unilaterally sanctioned companies involved in it, and of course Biden publicly alluded to threats of blowing it up: "If Russia invades ... then there will be no longer a Nord Stream 2. We will bring an end to it." "How will you do that, since the project is under Germany's control?" "We will, uh, I promise you, we will, uh, be able to do that *smirking*." [1]

With it blown up we're able to make Europe completely dependent upon US gas sold at a high premium. Well, at least that was probably the goal. Technically the attack failed and at least one of the pipelines was/is still viable, but the US probably was hedging their bets because there was no way to anticipate exactly how enthusiastic Europe would be about setting aside their own self interests for the sake of US geopolitics. It also helps ensure less chance of a reconciliation between Russia and Europe which is probably seen as a reasonable way of weakening both.

Reading "Rebuilding America's Defense" [2] by the typical names that show up in basically every US presidency, Democrat and Republican alike, is crucial to understanding US geopolitics. And one thing we obsess over is/was the prevention of the emergence of new superpowers. This is even mentioned quite explicitly in the text, "[Deploying US forces to Europe] is especially important in light of the nascent European moves toward an independent defense "identity" and policy; it is important that NATO not be replaced by the European Union, leaving the United States without a voice in European security affairs."

[1] - https://www.youtube.com/watch?v=OS4O8rGRLf8

[2] - https://governamerica.com/documents/RebuildingAmericasDefens...