We might never truly know but we do know that such accidents do happen and we need to do everything we can to try to prevent it.
What's really needed is effective oversight followed up with accountability and enforcement of existing regulation, not more empty gestures and handwaving for new regulations and "oversight" that will change nothing.
Rules without accountability or enforcement are just wishes. At some point you need to go beyond empty words and actually do something. That Fauci and others aren't already under a serious investigation tells you all you need to know about how effective your new regulations and oversight will be :p
Why you think that you can talk on everyone's behalf?