I decided to give this a try about 18 months ago. I was having some issues and figured that it couldn't hurt.
So I religiously gargled 1-2 times per day for 90 days. I received not one benefit. As a matter of fact, it dried my mouth out, rather than moistened it, which is not healthy.
So, from experience the activity does not do as it claimed.
Also, you mention that it has been "proven" to be better than flossing, but did not provide a source. Could you provide a source?
https://www.google.com/amp/s/askthedentist.com/oil-pulling/amp/
Thank you