The points against Devil's Advocacy are actually entirely antithetical to the practice. The reason there is such an Advocate is to make arguments more substantive so it's not this circular reasoning of "it's Evil, therefore it's Bad".

I don't otherwise disagree with what you say but the point is actually to require people to think and come up with strong reasons to disagree (or agree, as it might go).

There absolutely is when solutions might have unintended consequences.

And the practice isn't usually evil, just horrible planning. Companies aren't usually hiring people knowing they'll fire them. Rather it's company-wide layoffs or something, and the manager is as surprised as the employee.

So it's important to look at tradeoffs rather than just declare that one side is evil.