Might be shocking to some, but not all of Russia is one people. There are multiple interests there among country's leaders. And one such interest: to get rid off Putin's regime quickly. One way of doing this is to prevent any notion of "restorable" economic relationships with Europe under Putin. Without Gas, who needs Putin's Russia...
A prediction: we will see more of such actions in the coming months, leading to the winter
Without gas, Russia is in a worse position at the negotiating table, since it cannot promise to resume shipments in return for removal of sanctions. This is actually something that the pro-war faction (and Putin personally) would love. Conversely, the elites who want to revert back to status quo before the war would never do this.
Gas supplies are controlled by state-owned corporation. Putin and this corporation are one. There is no multi-factions within this organization. It is 100% under Putin's governance. If there was interest to cut supplies, they would have done this publicly. And they have the PR/Media to spin the story however they want.
On the other hand, elites don't benefit from this gas supply. For example, it keeps Ruble unreasonably high for their own exports. And it keeps the government under Putin's control (Gas finances the war as well as his pockets). And undermining gas supplies, creates a consensus among elites that Putin will not be able to sustain the economy for very long. Once there is a consensus, it is much easier to move against Putin.
In simple terms, like any Middle Eastern Dictator economy, Russian dictatorship is managed through government-controlled oil supplies, which elites don't have direct control over. If oil supplies are taken out of the equation, the economy collapses unless elites take over to manage it with alternative methods.
Bottom line, if gas stops flowing from Russia, elites (technology ceos, aluminium exporters, bankers, etc) gain back control.
Gas already stopped flowing from Russia to Europe. The question now is if and when it'll be restarted.
And yes, of course, for the peace faction to make use of it, they'd need to carry out a coup to remove Putin first, so that they are in control. That's precisely why it all adds up.
Nord Stream 1 was stopped. Gas is still flowing from Russia.
Anyways, the argument is actually more likely the opposite. Opposition was planning a sabotage. In anticipation, to downplay the impact, Putin claimed to punish Europe by stopping Nord Stream1.
A prediction: we will see more of such actions in the coming months, leading to the winter