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I used it to create the game mechanic where the player can only go through the tiny gaps sideways.
I tried using character controller for the player movement at first but it only uses capsule colliders for the player collision. I tried the standard starter asset but ultimately decided to make my own player controller with rigid-body physics which I admit is not as smooth/good.
I am pretty much doing that same thing but with a box collider + I lerp the collider size for smoother transition.
By moving through tiny gaps, I meant the mechanic where the player can go through the tiny gaps by strafing sideways. Capsule has a fixed radius so it won't matter if the player is facing straight or sideways.
I won't use such methods in my future games. It was just a unique scenario and I was doing a bit of experimentation with player movement. I have used character controller in my previous games, just this one is an exception.
Anyway thanks for the feedbacks and suggestion. I appreciate it.