I was wondering if we decided that blackholes are dense due to the spin and gravity? Are there any other factors for determining density? And could those factors also be true if a black hole were simply a vortex- like a drain per se. A drain that shoots out in two opposite directions, that shreds material into gas and shoots it out back into the galaxy or area surrounding it. Like a torus 4D phenomenon? My mind has a hard time accepting singularities, save the French philosopher Jean Luc Nancy's idea of such. Can somebody line this out for me?