I think this view is overly negative. First of all, consider the timing of this all; this was super early days. People, including many experts, had much less facts then, and the topic was sensitive. I think it's perfectly reasonable and even necessary that ill-founded but hard-to-disprove theories such as the lab leak theory at the time are examined critically, but to do so requires a healthy debate - in particular, a debate in which people constructively interpret what other's say, and don't take it out of context. The back and forth helps focus attention on all the various factors and indirect or partially trusted evidence.

But that means people must be able to propose ill-founded hypotheses. They'll be proposing tons of them as they try to separate fact from fiction!

In an idealized world you might do this in the open. Unfortunately, media outlets and social media including hacker news will take things out of context, as both the telegraph and this very discussion is doing right now. That's simply not a valid interpretation of the participants opinions and their confidence in them. Selectively quoting "experts" while they're still forming their interpretation of the data is misleading, because it removed the whole point of expertise; the reason you trust such expert opinion is because it is informed, and the social contract here is that experts should refrain from misusing their authority when they're not sure of their conclusions. And most generally do that to maintain their reputation.

So what to make of this? I think this could simply be part of a normal healthy debate; one that never saw the light of day simply because (a) evidence was lacking, and alternative explanations (e.g. of that furin cleavage site) emerged, and (b) given the lack of evidence and the unfortunate impossibility to express a nuanced opinion and have it be interpreted by the public correctly due to the charged atmosphere at the time, many chose simply not to speak.

That's not to say there aren't a few people that probably acted in bad faith, but the vast majority looks perfectly reasonable to me. And if we want to avoid this in the future, we need to have an atmosphere where nuance is expressible; otherwise you simply can't expect people to open up about potentially explosive hypotheses that they themselves don't even really support but cannot rule out; the damage to their reputation and to society would be too large.