"I'm not surprised"
They say in press that's "sibling" fighting (Yeah, Right). It is the easy way to explain it.
But there HAS to be more than that. The main reason bands split up are Money, Moolah, Mazuma. Who makes more of it, which way it's split.
The second is in most cases women if like Franco suggests, Trudie has Yoko'd the Police (I personally have a hard time believing that Stingo is dominated by his wife, the guy's too smart), like Stevie Nicks Yoko'd Fleetwood Mac, Kate Hudson Yoko'd the Black Crowes (Karma has already taken care of that), and, most famously, Courtney Yoko'd Nirvana (although there was much more than that involved in this case, and really Dave had written only 1 song for Nirvana, Marigold, while Chris had written none, so in this case I saw the 75%, 25%, 25% kind of fair).
In the case of the Police, there is the Beatle dynamics. Who really started and dictated the concept and the direction of the Beatles until 1966-67? John. Who took over in 1967? Paul. John adopted the passive aggressive attitude and tried to sabotage the band literally (the Let it Be case).
John was eternally resentful of Paul taking over His band and making it into something else which he did not recognize.
On a slightly smaller scale, I have always thought that this is the real issue with the Police.