Solid Inspector definitely does find reversed faces as well as other things that prevent an object conforming to the definition of a solid.
Begging the question a bit, for SU to refer to solids does tend to mislead people into thinking it is a solid modeller instead of merely a surface modeller.
By "loops’ I presume you mean lines to join up to form a surface (or potential surface in the case of a section cut).
I used to ignore surface orientation when I was less experienced. I never quite understood how SU decided what was right or wrong and it didn’t seem to matter much for what I needed. Even now, I find it odd that when you draw a rectangle in the XY plane, SU assumes the top surface is the back face. Maybe that is because when you extrude it, you would normally do so in a positive direction. But if you extrude it in a negative direction (ie. downwards), SU seems to know that you have created external surfaces and so changes the original reverse top face to white. Logical in some ways but not others.