But you haven't explained why...that was the point of repeating my 5-year-old-child-like question...why, given that the gravitational effects of anisotropy would naturally give rise to spin and rotation in 4-D spacetime, is it necessary to have spin and rotation otherwise built in primordially? And how?
I am not saying its wrong - it might be right...but...if there was, say, a hyper-massive black hole at the beginning of the universe - which would, probably, be spinning, and would, probably, have asymmetry built in then...
(a) it was not, in fact, a 'singularity' at all but a black hole, and
(b) there is no need to invoke supernatural causation because it could very adequately be explained as the incredibly dense, incredibly dark remnant of a previously existing...something... a hyper-massive galaxy, an enormous super-cluster, a contracting previous universe...whatever we think of that would be massive enough to cause a hyper-massive black hole when it collapsed.
So the answer to your 3 questions in the OP remains no, even if your speculation that the universe might have sprung from a black hole is correct.
So if you are maintaining that rotation and spin were somehow supernaturally pre-ordained, the question still remains - why? Why would such an explanation be necessary?