How can jelqs compete?

I am taking a bit of a break from PE ( well the practical side I am still studying the theory ) and during my reading I have been struck by the difference in sheer volume of stretch that someone doing an ADS as opposed to someone doing manual stretches or jelqing and was wondering how jelqing can ever compete?

I mean if someone wears a device that applies constant pressure throughout a long period it seems to have a certain logic behind the idea that growth will occur. It brings to mind those pictures of cultures where the sustained wearing of metal rings around the neck results in the eventual elongation. Or maybe the practice of wearing a brace on ones teeth for a year or so with constant and steadily increased pressure results in the gradual movement of the teeth.

Now I have read on here and elsewhere that people are wearing these devices on their penises all day even whilst at work and was wondering how can jelqing for a few minutes a day stimulate the same kind of growth? I mean a dentist wouldn’t say to a child wear the brace for a few minutes a day, instead he would insist it should apply it pressure all day every day.

Any thoughts?

Its just a different kind of exercise then stretching with a different impact.

Jelq creates pressure along the shaft which is also a stretch,espacially in lower erection levels, but not like a straight out stretch.

So there isnt actually a competition.. they rather go along with each other.. if that makes sense?