I have that OCD as well, I like to see all my lines straight. I go one step further which is that if it is not closed, if that hole is there in the middle, I can’t live with it, I have to close it and waste geometry lol.
But yeah, it’s not necessary, you were doing fine from the beginning, scaling towards the middle is ok. There is also the Alt+S which lets you scale along the normals.
