What happened is that scientists who believed a theory advocated for it over competing theories... which is how science happens. Granted it so happened that some of those advocates were very notable and well-regarded scientists, but again: this is literally the story of science. It's constantly a question of when someone's prior success and credibility hits a wall and gets successfully challenged — which is always difficult.
And yes, one consideration was their (IMO entirely legitimate) concern that statements on the generous end of true rather than the cautious end of true (i.e. "we don't know but it looks zoonotic" vs "we don't know but it doesn't look synthetic") would have gigantic negative consequences including prompting military action against China.
The funding note toward the end would be a bit worrying except that NIH also didn’t fund any study examining the zoonotic origin.
Scientists publishing a paper with their assertion that they find the lab leak theory implausible is not "censorship" or "throwing their full weight" behind squashing alternatives, lol. Anyone else was free to publish their paper arguing the opposite.