No black holes absolutely exist. The researches have established an upper limit on the fraction of mass of black holes compared to all of the matter in universe

No black holes absolutely exist. The researches have established an upper limit on the fraction of mass of black holes compared to all of the matter in universe. Per quote below this comes out to no more than than 23%. " An as-yet unpublished reanalysis by the same team using an updated list of 1,048 supernovas cuts the limit in half, to a maximum of about 23 percent, further slamming the door on the dark matter-black hole proposal. " Since dark matter makes up 85% of total matter this rules out black holes as the primary contributor.