Actually Tom Brady has a special guy he uses to immediately massage any tweaks he has. So it's not that it's not well known, it's just not adopted well by everyone.
I personally use turmeric and make it into a paste, RICE is old but it's easier to tell a patient to do that then to actually do some work, lazy society syndrome unfortunatley.
I think the use of hydrotherapy is underutilized in all medical facets.