Because I was asking for perma Devils 
Blame this thread for putting the idea back into my mind - Permanent Pneumatic Burst Discussion
I hate having to repeatedly spawn Wind Devils more than pressing the heal button once every 30 seconds, so thought I would take my shot even if it was mostly likely going to be refused :3
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Personally, I don’t see issues with making it permanent in terms of the skills strength since from my perspective it is only a QoL change and nothing more as the duration is considerably higher than CD anyway. Imo, it is not going to get noticeably weaker or stronger just because having to repeatedly press the button is eliminated, unless it is about the travelling distance and summoning animation making the difference? (not sure how much of a difference that brings)
But anyway, none of it matters anymore since Z is clearly against the idea. So, I will simply have to keep using the Codex of Eternal Storms in my pet builds 