Presumably finding unbiased people is impossible. Trump latched on to calling it the "China virus" because he knew it would feed into nationalism/separatism and harm Chinese imports. All countries are involved in global trade; at this level of importance most people could be influenced.

As far as finding frozen samples, you'd also need verifiable documentation, presumably, otherwise we wouldn't know if it were a zoonotic sample ... so we wouldn't know if it were a wild origin, or a lab-captured origin?

If it were a lab-release, was it accidental or the actions of some other nation wanting to harm China.

It seems to me that conclusion people want is quite possibly not out there.