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

[AnotherPerson]

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.

can confirm - but people misjudge how useful the slow is - it's good for delaying damage but you're still taking the full brunt of the damage just at a later time. Still hurts, so not used as much but still useful to have if you're hitting 50% hp and next heal isn't coming out anytime soon.