>>286476147
Yes. Touch has three binary values:
>thumb
>first finger
>middle finger
Each can be on or off, and these make the 8 gestures (the 9th doesn't exist). There's no ambiguity.

Index has five analog values and they have to be perfect to trigger the gesture, so there's a much bigger margin of error, considering the inherent imprecision of Index controllers. You can have your hand fully open, but it won't trigger 'hand open' because the sensor thinks one finger is slightly curled, and you have no way to know without checking in a mirror.