Building a contagious disease is already illegal, there are already things like KYC laws for plasmids. Trying to gate keep knowledge of biology is paying a huge societal penalty for the tiniest marginal increase in “safety”.

All the knowledge to create one has been available on the internet for decades. Heck most students who graduate with a B.S. in biology have enough knowledge to take a stab at building a bioweapon.

The constant talk of bioweapons is mostly just fear mongering. It helps set a precedent that there should be certain types of knowledge which are off-limits, and only certain anointed groups should be have access to parts of the scientific body of knowledge.