And that's my point.No alignment is obvious unless you spend a good amount of time in the person's presence. Especially since alignment isn't a straightjacket and people can and do often step outside of their alignment. If you do spend a lot of time with someone, they are all pretty apparent, because you can see how that person generally behaves.
Alignment is too basic for in depth personality roleplay.
Alignment is better for devising alliances, allegiance, and initial reaction. And only LG, G, E, and CE are in your face on how they act outside of alignment fanaticism.
When I'm creating a rebel, I am going farther than CG. I am determining why they fight authority, how far they go, which laws they follow, tec.
But CE gnolls? Nope. They are just slaughtering people for the demon lord. You see the gore around them. There is little attempt to hide their evil and chaos. It's all around them. I don't need to go deeper as they are likely dying before I have to care.