All else being equal, it's obviously better not to spend an extra minute or two doing something useless.
If you think it is not actually equal, and that scraping is indeed better, well say so and qualify your statement. You can even say that it's recommended by dentists, it's an authority argument but it surely is better than nothing.
I’m not sure why I have have to defend flossing of all things. I’m not trained in that field, neither are you, we should listen to the people who are and guess what? They almost all recommend flossing.
That argument was accepted with COVID vaccines, so why not now?
>A nothing proves it isn’t, so you might as well
That's completely different from
>I’m not trained in that field, neither are you, we should listen to the people who are and guess what? They almost all recommend flossing.
Far from universally and even in the pockets where it was, at least some percentage did it just to be able to go back to doing normal things which were gated by government rules.
Don’t do anything blindly. They won’t be the ones bearing the cost if and when something goes wrong.
Also, nothing doesn't prove eating twelve apples per day cures cancer so why not try it ?
