Technology

They were literally just making up arbitrary rules that had nothing to do with science, and saying it WAS based on science.

Give me a solid example of the "they" in this case, the rule in question and the date that that the rule was imposed.

Meanwhile the then director of the CDC said we should investigate if the virus came from a lab as well as if it had a natural origin, and was forced to resign as a result.

Are you talking about Rochelle Walensky? If so, there are many possible reasons why she decided to resign, but I can't find a single source saying it was because she said there should be an investigation into Covid's source.

Edit: Ah, you are talking about Robert R. Redfield. So from what I can tell, his downfall was that he wasn't being scientific - he stated that the he thought it most likely that it was a lab-leak, and that certainly didn't win him any friends because the assertions he made weren't well supported. But was he "forced to resign because of that" - looking at the coverage from back then, he was under fire for multiple reasons, not just that. I don't think we can say that was the sole or even main reason for his departure.

Also, if you're not even sure what the truth is, what gives you the right to silence people that have a different opinion? It makes no sense. Where is the authority to silence coming from?

Because the process of science (especially in fast-moving situations) is all about producing increasingly accurate pictures of the truth. Scientists are highly resistant to characterising something as the truth - there often more to explore. You can absolutely have scientists with different opinions - but they will be looking at evidence, not just making stuff up.

You ask

What gives you the right to silence people that have a different opinion? It makes no sense. Where is the authority to silence coming from?

The silencing isn't being done by scientists, its being done by public health officials and that is somewhat different,. Public health officials take the best evidence as presented by scientific consensus and have to create messaging designed to minimise the number of deaths and maximise wellbeing. If the scientific consensus is that vaccination is safe and effective - that messaging will save millions of lives. Some Russian bot factory amplying a ludicrous idea like "the vaccines will alter your DNA or make you infertile" is specifically designed to kill people.