Last I checked, actual evidence that flossing is helpful seems pretty limited.
" In light of the results of this comprehensive literature search and critical analysis, it is concluded that a routine instruction to use floss is not supported by scientific evidence."
" In light of the results of this comprehensive literature search and critical analysis, it is concluded that a routine instruction to use floss is not supported by scientific evidence."
https://pubmed.ncbi.nlm.nih.gov/19138178/