yeah, i'm picking up on that, momma didn't raise no fool!
From the perspective of the Chinese arts, if you take a look at the stance done with the feet pointed directly forward, we feel that you lack stability from side-to-side. Your base is only as wide as your foot is narrow. If you compensate for that by widening your stance, then you leave your centerline open to the front. Instead, if you turn your foot in as far as is comfortable, perhaps putting it on about a 45 degree angle, you have now increased the width of your base probably by about 100%, which gives you more lateral stability. Your front-to-back base is already very deep, the full length of your stance, so stability in this direction is not affected. And as I mentioned before, having the front knee pointing in the same direction as the front toes, helps to cover and protect the groin from a frontal attack.
Some people in the kenpo community like to still point the rear foot directly forward. I personally disagree, and my experience in the Chinese arts seems to be in agreement with my thoughts. For myself, unless my bow stance is very high, I cannot confortably point the rear foot completely forward. It seems like it stresses the rear ankle, and feels like it sacrifices some amount of stability. Instead, the rear foot is still on an angle, similar to the front foot, but probably turned somewhat more foreward, but not completely.
Sink and turn thru the hips so the torso is facing forward.
The front toes and rear heel should be in line with each other. Less than that and your centerline is too closed, making it difficult to launch techniques. More than that and you are leaving your centerline open and exposed.