There is no reason to suppose that, if Sars-Cov2 originated at WIV that it was NOT part of a bioweapons program simply considering the tight integration of the PLA with all forms of research deemed of national interest in China. It's certainly not evidence AGAINST there being a bioweapons angle to Sars-Cov2 (if it emerged from WIV) that the PLA is involved (as it has been documented it is)[0][1].

[0] https://www.washingtontimes.com/news/2020/feb/16/chinese-maj...

[1] https://www.nature.com/articles/d41586-020-02523-x