Gain of function research is not anywhere near as dangerous as the public believes. In the US, it was very convenient to blame it for the pandemic, even though SARS-CoV-2 is of natural origin and almost certainly spilled over at the Huanan wet market in Wuhan. The threat of viruses comes almost exclusively from nature, which is constantly cooking up new viruses all by itself and exposing people all over the world to them. A few people doing tightly controlled research under high-biocontainment are a drop in the ocean. But their research is the main way we can prepare to deal with future pandemics, not to mention understanding the usual viruses that already afflict humanity.
I think your reply did a couple things:
* strengthened the point of the GoF comment
* pointed out how high-biocontainment is the key here, which obviously wasn't present in this case (and I'd say the vibes for AI research in general are that it's not high-containment)
* correctly argued that AI research is definitely worth doing and holy shit we need to work on alignment