On the media 'not taking it seriously' - because there was no evidence whatsoever outside of conjecture and it was being pushed heavily by misinfo merchants. No grand conspiracy. Skepticism is a good default approach to take for info heavily pushed by such sources with no solid evidence.
There were tons of articles and threads on it everywhere including HN, no one was being silenced, give me a break. The oppression complex is really out of control, as if people were being visited by the secret police and forced to immediately cease all discussion about the lab leak theory. It just had no credibility due to lack of evidence. As more info comes to light it's being given more credence, simple as that.
Really seems many want to feel like they've been oppressed and silenced when that couldn't be further from reality, reaching absurd levels of delusion here.
The "human story," conflicts of interests and such, gets most of the attention... unfortunately. Some of those interests were/are personal. The most onerous interests seem to be narrative. One narrative or the other suits a grander political narrative, for a variety of reasons. That kind of stuff sucks us in, unfortunately.
There can be a fine line between skepticism and orthodoxy though. Skepticism defaults to ambiguity. I'm sure that ambiguity is the majority position, but "I don't know" isn't a position that gets much journalistic and political attention.
Media, both new and traditional, gravitates towards hard positions... poop slinging and human conflict stories.