As a simple response to your question, don’t you believe it would be wise to at least identify a cause and reason for the sake of preventing a recurrence? Your initial paragraph is spot on. To this end, there is ample reason to want to understand in full what occurred and do whatever is possible to prevent a repeat of this.
Even minor occupational accident that injures a person or even damages property requires a thorough investigation and report defining how it happened and what steps are being taken to prevent a recurrence.
This virus is the reason for millions of lost lives across many countries. Wouldn’t it be responsible, at a minimum, to pursue the reasons contributing to how this happened?