One webmaster asked John during the 10/1/2021 hangout if Google recommends a way to clean up indexable internal search pages.
John explained that the indexation of internal search pages makes crawling a lot harder.
Google’s preference is that internal search pages are all noindexed. All internal search pages should be noindexed.
Also, it creates a security risk if anyone can just go off and create a million new pages on your website by linking to random URLs and words that they create through internal search.
This conversation happens at approximately the 52:28 mark in the video.