Star alignment around BH Galactic Centers

[InfiniteNow]

A blackhole in spacetime… I believe is spherical.

 

We’ve found that the majority of galaxies have a blackhole at the center.

 

So, my question is as follows (please advise if the opening maxims are mistaken, as that would invalidate the question itself, but would make me no less curious as to why/how the below happens).

 

 

If a blackhole is a spherical object in spacetime, how come the galaxy itself, when viewed edge on, appears flattened… like a pancake?

 

Why don’t all of the stars rotating around the hole form a spherical cloud around the spherical blackhole? How come the stars do not also rotate in a spherical manner, instead of a series of spiral arms?

 

Is it just that blackholes rotate, and hence the stars themselves fall inline with that rotation? If so, what is a good way to learn more about the process prompting such a motion as a result of that rotation?

 

 

 

Visually, below is a close representation of what I envision. The hole itself is a sphere, and the stars are pulled into orbit around it, yet they have a horizontal symmentry… if that helps clarify the question.