Your experience seems to be at least 3-6 months old. Long time kernel maintainers have recently written on this subject. They say that ~3 months ago the quality and accuracy of the reports crossed a threshold and are now legitimately useful.
Yes, what we see coming out of the bottom of funnel is now is a little better. But it's sort of like reading day trading blogs: nobody shares their negative results, which in my direct experience are so bad they almost negate any investigative benefit. I also think part of this is that a small set of very prolific spammers were sufficiently discouraged to stop.
The experience I'm describing was two weeks ago.
Yes, what we see coming out of the bottom of funnel is now is a little better. But it's sort of like reading day trading blogs: nobody shares their negative results, which in my direct experience are so bad they almost negate any investigative benefit. I also think part of this is that a small set of very prolific spammers were sufficiently discouraged to stop.