A million little reasons
1) I'm not one of these people who thinks the algo has no affect on me (which is just the new version of advertising doesn't work on me which is a theory disproven by advertising's very existence). I have tried to curate twitter to a point, especially post elon-takeover, where my feed is usable. If I didn't I'd see Nazi propaganda all the time (as opposed to some of the time). But when this story broke, the zone was absolutely flooded by The Narrative and the counter programming, which to me looks broadly correct now, was left in the dust
2) I don't associate the IOC with being something kind of moral authority on competitive fairness. They're probably jus as corrupt as any other monied interest with a lot of power.
3) When the story first broke, I saw "well the IBA banned her so what's the IOC's deal" all over the place without knowing the IBA is basically a Russian propaganda outlet
4) A propaganda campaign has to have some degree of plausibility to work right? There's a reason why say, climate change is a hoax, has some currency with huge segments of the world population and "birds aren't real" doesn't.