> A 12-nt insertion at S1/S2 in the spike coding sequence yields a furin cleavage site, which raised controversy views on origin of the virus. Here we analyzed the phylogenetic relationships of coronavirus spike proteins and mapped furin recognition motif on the tree. Furin cleavage sites occurred independently for multiple times in the evolution of the coronavirus family, supporting the natural occurring hypothesis of SARS-CoV-2.
"Furin cleavage sites naturally occur in coronaviruses" - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7836551/
Just one paper among many, not sure it's as strong evidence as you seem to think.
Overall, current evidence seems to be mostly be pointing to a natural origin, maybe linked to wildlife sold in Wuhan.
Wonder when we'll reach any sort of conclusion to this.