> The court didn't find that Whitmer acted arbitrarily or capriciously, they simply ruled that she lacked the authority for the actions she took.

Specifically, it found that that emergency powers act under which she acted was an unconstitutional delegation of legislative authority; the fundamental error the Court found was by the legislature, in not crafting an emergency powers law with sufficiently defined boundaries (or, alternatively, by not availing itself of the process to amend the Constitution to create broad emergency powers.)

There have been many suits about many measures in the US. My selection of Whitmer was meant as a single illustrative example, and not necessarily meant to embody all possible civic vices; if you simply wish to clarify that Whitmer was not ruled "arbitrary and capricious" then that clarification provides people with additional factual information which is well and good.

On the other hand, you can go next door to Ohio and find a ruling using that language in Rock House Fitness et al v. Amy Acton and Lake County General Health District. I decline to enumerate further suits at this time; I need to stop somewhere or I'll be here all day and it won't do anyone any good.