I think the instances of individual cops and management-level police chiefs and sheriffs unilaterally deciding they aren't going to enforce these laws and regs and directives from their civilian political leaders presents a huge moral hazard. They work for the Executive Branch in furtherance of the laws/regs that exist. They do not work for themselves nor do they comprise a 4th branch of government.
The courts and the elections are where the questions of what is/isn't constitutional or acceptable gets played out; not on the street. Just because it's not possible to completely eliminate personal bias from these decisions doesn't invalidate the imperative to assert and make the good faith effort towards that ideal of justice being blind.
Not for gun control laws, not for drug laws, and not for shelter-in-place orders. Among others.