Just for the record, Andromeda321 is a postdoctoral fellow in astronomy at the Harvard-Smithsonian Center for Astrophysics who specializes in radio astronomy, so I really would take what she has to say seriously. The researchers behind this new study also acknowledge at the end of the article there's a 5% chance that the apparent connection between the FRB and the gravitational waves is entirely a coincidence, which is pretty darn significant (and possibly up for debate). I believe that's the main point she wanted to make.

If a causal connection is confirmed, these results are very intriguing and fascinating. But as is often the case in science, independent and more exhaustive confirmation is key before we get too excited.

With that being said, you're definitely not wrong to be skeptical of a seemingly random redditor's claim lol