A scientific article about the origin of omicron would be expected to provide citations and evidence behind everything it says. It would also be expected to discuss all the leading theories, as well as what additional information we need to figure out which theory is the one most likely to be correct.

A news article from a journalist might interview the experts to get their opinion and summarize the scientific consensus to the general public. Ideally it should also allow an interested reader to identify what scientific publications the news is talking about, should the reader desire to find more info.

This blog post is none of that. It ignores the leading theories in order to paint a biased picture that only a lab leak is possible. Their main "evidence" is someone on twitter. A close read reveals innumerable holes and red flags. For example, it when it says that omicron couldn't have evolved in an immunocompromised patient because they "don't have the antibodies". They actually do, it's just that they don't have as many! The whole point of the immunocompromised patient theory is that a long infection with a weak immune response provides selective pressure for immune evasion, while giving enough time for mutations to develop. Things like this demonstrate that this author has little idea of what they're talking about.

Someone else made a comparison to arguments from creationists, which I think is apt. They throw a bunch of things at the wall, hoping that something sticks. But they don't paint a coherent picture and if we look close it's a mess.