Some decades ago I learned of Yilmaz's work that did away with Einstein's constant (which Einstein never liked anyway) by postulating that, like all other forces, gravity caused gravity.
The upshot was that per his calculations, black holes did not exist. Intense gravitational wells still did, of course, but nothing that couldn't be calculated; nothing that 'broke' physics.
I dunno. I can barely tie my shoes, much less do the math. Still, the concept of singularities offends me viscerally, and Imma follow the link and hope someone has proved they don't exist with simple addition and small numbers.
Thanks!
parallel universes.