Can confirm that water pick and flossing work differently. Flossing is not primarily to dislodge food particles but distupt bacteria between teeth. So just water pick alone would be like trying to wash your car by just hosing it down with mild pressure. You want to firsh disrupt bacteria with mechanical action them flush them away with water.

That’s a good point that i never thought to ask about, how tight teeth fit might have influenced the advice i heard.

My dentist recommends interdental brushes over flossing.

Interdental brushes are more effective in removing plaque than floss. [0,1]

Water picks are good for reducing gingival inflammation. [1]

[0] https://pubmed.ncbi.nlm.nih.gov/19820738/

[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6630384/

try alternately flossing, then using the waterpik, or vice versa. You’ll find that either way, the second modality dislodges food particles left behind by the first. I take that as evidence that both > one > neither in terms of dental health and this of course assumes you then also brush your teeth.

Where did you get the attachment? Or which brand model?