Below: Black hole hierarchy differences observed through the cross section of galaxies. The Different black hole sizes seem the origine of the impossibility to form axial symmetric Herbig Haro systems , able to form stars in the middle.
We observe three diameters of Galaxy Black Holes 1:One or two Super heavy Bhs in the middle , 2: A lot of smaller Bhs around the center, which are unable to form Herbig Haro large stars due to the attraction difference with the central super BHs. 3: a lot of intermediate Bhs around the center, still able to form Herbig Haro stars, also called Tadpole stars, fast travelling through the universe pushed by a plasma tail, unable to find an equal member for Herbig Haro star/ galaxy formation.
see also; https://www.researchgate.net/publication/318317290_The_Origin_of_Dead_Galaxies
and: https://bigbang-entanglement.blogspot.com/
and: https://bigbang-entanglement.blogspot.com/2023/10/equal-sized-binary-black-holes-do-not.html