Do we need the crouch ability in our game?

I've seen games that feature increased firing precision while crouched. The mechanic can lead to changes in pacing and ammunition spending. I personally like it. But why not just have Hold to Crouch as default? Players who set it to toggle will have forced awareness of the setting and the relevant button.

I don't think you can make a fps without crouch, might as well take away jump while your at it.