This is sort of bait and switch. The current concern is that it might be a natural virus that people caught in the lab. The articles you quote about conspiracy theory are talking about claims it was engineered.
It may be impossible to know whether it came from the lab. If they were studying something that came from bats and has been around since 2012, it could have been in both the market and the lab, in which case it's probably impossible to know where the epidemic came from. The story about three lab staff is worth investigating, but it only says they had similar symptoms to Covid. But since Covid has symptoms that look like Flu and lots of other things, it's hard to know what that means.
The Chinese are not likely to allow access to the records needed or an investigation. Maybe that means they're guilty. Maybe it means they're a closed, paranoid group.
The bait and switch are those who had defended the "It came from the wet market and any claims of lab accident are conspiracy theory" and still trying to say "even if it came from the lab, it definitely happened naturally" (which again, is bare assertion, and not, by any means, established fact).
The Lancet report by WHO scientists called any hint of "lab accident" conspiracy theory, not just claims it was engineered.
Gain of function research with bat coronaviruses was happening in Wuhan labs prior to the onset of the pandemic. That doesn't indicate that Covid was engineered, but it certainly should be investigated, as opposed to the coverup which happened initially.
As far as "Covid has symptoms that look like Flu and lots of other things, it's hard to know what that means", it also has several symptoms that don't look all that much like the flu. If it were fever and nausea, they wouldn't be calling it "Covid-like symptoms". Also, three researchers needing to be hospitalized from the same illness is much more consistent with Covid than the flu. It's not a smoking gun, but i find it hard to believe it's just coincidence.
The WHO has lost credibility, as it released a biased report attempting to stifle actual inquiry as to the actual origin of the virus.
They haven't found any trace of the natural origin other than that it's 96% consistent with bats being kept in the Wuhan lab, which were taken from over 900 miles away.
At this point, pure assessment of the facts would indicate that lab accident is the most likely scenario, with "from bats who were captured and studied" and "from an engineered virus" being the unknowns.
