They tried, Masimo gave them sky-high licensing fees as a means of extortion. It’s an absolute nightmare scenario for Masimo that this (fairly simple) technology would be available to anyone besides insurance companies who pay them tens of thousands of dollars a pop.
Imo it’s appropriate for the government to step in and allow the general public to receive access to this life saving equipment without folks needing a “good insurance” plan whereby some bean counter with no medical training has looked over all your medical records and decided you are worth dropping bundles of money on to have a constant pulse taken.