Agreed, but it is specific enough to at least see if he can do it again, once = random, twice = coincidence but the chances of doing this twice are pretty remote.
What's exactly specific? I'm not an expert in Geology but my understanding is that these hot spots are largely known. The outlier prediction will be for a location of an earthquake outside these hot spots. Here is a random map I found on the internet but I think matches a few ones I've seen before: https://broadview.sacredsf.org/wp-content/uploads/2022/10/Ma...
Heh, that map shows the west coast of the US as completely covered. I assure you that we don't have daily earthquakes that are even noticeable, let alone destructive. I live in an area covered by orange circles, and have for nearly 20 years, and I've never felt a M7+ earthquake. The ones I usually do feel are no more than M4.5 or so, and happen at most a few times a year.
My point is that it doesn't really matter if you "predict" an earthquake inside or outside these hot spots: you will nearly always be wrong. And when you are right, it will be due to luck.