Ive never seen anyone else use this and it makes me sad

[Eldevern]

I only can do an hypothesis.

I suppose tanks are used to keep it to avoid "push-back/projections" attacks. The slow-down effect is probably considered as secondary.

If you take the habit to use it in you rotation, you could end to be tricked by yourself when you need it to avoid a push back and the enemy has resist already.