I take issue with this claim.
As evidence I present: https://mynoise.net
Also archive.org
As someone with ADHD this is the only way I can get coding done. I put on usually 3 to 4 noises, at least one of them musical, and set them to a standard slider animation. Duduk Song and the Japanese Oase are two particular favourites, and the vocal generators are all pretty amazing. Oh! And the tuned cave droplets.
I find also it doesn’t tend to become its own distraction. Once I find a group of sounds, the only way to experience them is to put them in the background and let them go while I do other things, so it actually helps me get started.
Donating was a very good use of a few dollars.
There’s a similar app for Android if it interests anyone: https://trynoice.com/