The potential cost of a new virus is so enormous that measures reducing the probability of its occurrence, even marginally, are ridiculously cheap bargains even if they're expensive in absolute terms. But we need to know what really happened in order to take the right measures.
I admit that I do find the lab-escape hypothesis plausible. I'm not certain of it, but there's a lot of circumstantial evidence that points in that direction. Perhaps one reason this hypothesis hasn't been publicized more is that those most qualified to assess it aren't eager to learn that some of the research they do is insanely dangerous, and that members of their profession may have committed a screwup of world-historical proportions.