He makes the exact opposite claim in the video. He thinks 20% is far too high and no one will pay for it once these tools are no longer available for free. He specifically cites the company Coverity that also found many useful bugs with their code analyzer but had a much smaller false positive rate (something like 5% I think), and no one paid for that, and the founder had to write a post mortem. He thinks the same’s going to happen to these LLM tools if they stop providing it for free.