I think much of the interest in theories of lab leaks, or various other theories - credible or not, are mostly propelled with the same thrust as groundbreaking

I think much of the interest in theories of lab leaks, or various other theories - credible or not, are mostly propelled with the same thrust as groundbreaking science itself: they want to find some truth about the world that's been unnoticed or less discussed. This is what motivates conspiracy theories and scientific discoveries alike. It's even true about flat Earth kids, however misguided they may be. The "so what?" is always an after thought, and often is irrelevant to the goal of simply finding something new.