That is to say, is there an actual person who is perfectly fine with all the terrible things the CCP plainly does, but finding out that they've been incompetently handling research will suddenly make them change their views?
Sure, maybe the CCP screwed up containment, and that mistake cost millions of lives. Every single major government around the planet has facilities like the one we're discussing. Every single one has made mistakes like the CCP possibly did. The CCP were just unlucky in that their mistake wasn't confined to one person or the welcome lobby.
Knowing it was engineered in a lab would put a bigger spotlight on facilities like these. Unfortunately, its most likely to only result in sanctions against China, but if the people in charge could summon an ounce of sense, it could also mean more of these facilities being shut down, their research suspended, and the live cultures of humanity-destroying plagues in their vaults destroyed.
The basis for GoF research (at least, the publicly-espoused thesis, bioweapons research being a likely secondary interest) is that such research can help us stop or reduce the impact of a pandemic. If the natural origin theory turns out to be the truth, then this adds lots of weight to the idea that we SHOULD be aggressively pursuing GoF research in order to fix the next naturally-occuring viral pandemic. However, if sars-cov-2 actually came from a lab leak, then we have evidence that such research is both far more risky than we thought and as well that natural pandemics are less likely than we think, so we should probably not do it at all.
... which is a critical thing to consider when reading virologists' opinions claiming that it couldn't be a lab leak. There is a very obvious conflict of interest here.
I don't have a good answer how to deal with this conflict, since it is hard for non-virologist to judge the arguments, but ignoring the conflict of interest entirely is not the solution.