The Constitution is written, intended, and designed to protect the people from the government. Said another way, the Constitution provides protection for the people's right to defend themselves from an overbearing and tyrannical government.
When we get to the point where we expect that law enforcement is to be revered at all times, and has free reign to do anything they want, unobstructed, with the approach that "the courts will sort it out," we're then beyond the point of endorsing tyranny. While I believe that most LEOs are decent people, the people should not fear the government, nor should they have to incur the costs of defending themselves against violations of the law committed by law enforcement who figure that an overextension of their authority will be sorted out by the courts. It has become abundantly clear in recent years, if not before, that the government is not capable of holding itself accountable for anything.
We can all debate the genesis of the problem, but the point is that while the Constitution enumerates specific powers to the government, those powers aren't unlimited, and are accompanied by protections and powers afforded to the people to enable them to keep an unaccountable government in check.
JKG