Are We Inside a Black Hole? Wonky Galaxy Movements Suggest It's Possible

Makes sense because the mass of the known universe intuitively is enough to prevent even light from escaping its total gravity.

Should our universe accordingly be spherical?

Can we detect outside objects entering the universe's event horizon?

What if any statements can now be made about what goes on inside the black holes that we can observe?

Other discussion:

Is our universe trapped inside a black hole? This JWS Telescope discovery (space.com)

Maybe the universe is collapsing into a singularity but we perceive time in reverse