It has plenty of relevance. If lab leaks are the source of the virus, any serious solution will need to include improvements to lab containment and practices. Knowing what happened in a hypothetical lab leak could also help identify the original animal to study. Understanding how viruses hop & adapt from animal hosts to humans begins by studying specific cases of it.
For example, past US lab virus leaks including SARS have led the Obama administration to temporarily suspend and investigate the risks of Gain of Function research in 2014. At least one of the Wuhan labs were conducting Gain of Function research at the time of the outbreak.