That sounds like the same problem (a deluge of slop) with a different interface (eating straight from the trough rather than waiting for someone to put a bow on it and stamp their name to it)?
Seems very similar to turning on compiler warnings. A load of scary nothings, and a few bugs. But you fix the bugs and clarify the false positives, and end up with more robust and maintainable code.
I've found it's pretty good. It's really not that much of a burden to dig through 10 reports and find the 2 that are legitimate.
It's different from Hacker One because those reports tend to come in with all sorts of flowery language added (or prompt-added) by people who don't know what they are doing.
If you're running the prompts yourself against your own coding agents you gain much more control over the process. You can knock each report down to just a couple of sentences which is much faster to review.