What is the downside of an unconstitutional act? The worst penalty is a strong news release. So why should we care whether or not something is unconstitutional? Hillary erases federal evidence, no problem, Comey lies under oath, no problem, Obama....
I think other side of that coin is that when the government finds it can ignore its own laws and do whatever it wants without consequences, that also heralds the end of the republic.
I think both points have been reached.