I mean, I can tell a just-so-story as well. It's just that, like your explanation, it involves Putin making what seems to me to be a dumb decision.
Some parts of game theory emphasizes ostentatious signaling that you can't turn back (e.g. 'win the game of chicken by clearly throwing your steering wheel out of the car before the game starts, so the other person KNOWS you can't turn' line of reasoning, which is stupid but some people occasionally try- the most famous successful example is of course Cortes burning his ships). In support of that, it's possible Putin was afraid of a coup: shortly before the invasion, he made each and every member of the cabinet get up on national TV (recorded to tape and broadcast a few hours later) and give a speech about why the war was a great idea and just the thing for Russia, that seems consistent with preventing an anti-war clique from trying to seize power if the war became unpopular, because you had everyone even close to power on the record, before the war, as major cheerleaders for it. If Shoigu or Lavrov or whomever try to seize power in a coup, banking on ending an unpopular war to give them legitimacy, they have to explain away those speeches and their full-throated support of the war back in 2/2022.
Similarly, ostentatiously destroying the pipelines in a way that will take months to fix even if you wanted to removes the ability of a coup to win goodwill and legitimacy with Europe by immediately turning on the pipeline and letting the CH4 flow. Is it what motivated the bombing? I don't know. Does Putin fear a coup by his senior people? I mean in the vague sense that all dictators are aware that it's a threat, certainly. But is he actually taking steps to prevent it? I dunno. Is this explanation plausible? I dunno, but I wouldn't bet my life on it. Is it just as plausible as the US or Poland or Norway or Ukraine or even Germany blowing up the pipeline? That I do think is a clear yes. Which is why I paraphrased that analyst before, none of the explanations really seem plausible, but one of them has to be true.