The reason against any ban or anything is that nature doesn't care about your pesky laws and happily tries to develop bio-nukes every single day.
I would vote for bans or limits on what is essentially bio-weapon research though, but that has implications. Should we finally destroy everyone's stockpiles of smallpox? Are we better off not having those stores to test with as we develop new technologies? I'm not an immunologist so IDK how useful an essentially dead disease is to keep around
