If a ring of doctors were caught illegally selling organs, we wouldn't title an article "Doctors have been selling organs for years". If bank tellers in a specific city were taking some money off the top of deposits, we wouldn't write "Bank tellers have been stealing money for years".
I'm sure there are some national issues with policing in the United States, but most police organizations are local. It's very unlikely that every local organization is bad, and even if they were, it would be very unlikely that every local organization is bad in quite the same way.
I don't think headlines like this help us balance the discourse. There's no concerted effort by police nationwide to spy on black reporters and activists. This is about a problem in Memphis, Tennessee. The content of the article doesn't imply anything beyond that. The title is extremely sensationalized, and many people will only read that far.
The problem I find with arguments such as yours is that you're looking at the few exceptions to the norm and not the trend of policing in America. Yes, there are likely a few good police organizations just like there are likely a few good cops or a few good politicians. But the point is that when the institution as a greater whole is corrupt, then it calls into question even the few good people that remain complicit in its existence. You should be demanding answers from even the good apples and making sure they stay good, not give them a pass because they haven't gone bad yet.