"I must protest. To offer the Klingons a safe haven within Federation space is suicide. Klingons would become the alien trash of the galaxy. And if we dismantle the fleet, we'd be defenceless before an aggressive species with a foothold on our territory. The opportunity here is to bring them to their knees. Then we'll be in a far better position to dictate terms."
I can almost hear them discussing Admiral Cartwright's protest about giving the Klingons a safe place within the Federation after the destruction of Praxis.
Fleet Admiral Cartwright did get a bum wrap and was correct to a degree. While I don’t agree that the Klingons would be trash, I do agree with one of the things he did say, about dismantling the fleet. Also about that they would be defenceless before an aggressive species with a foothold on Federation territory,” And what happened when they dismantled the military sections of the fleet, and kept only the exploration and scientific fleets active.
With almost the complete loss of the military arm of Starfleet the Federation opened themselves up to attack, the most apparent examples of this is the the Borg invasion, Cardassian border wars, and the Dominion war that followed it, where the former forced the Federation to come to the negotiation table and the latter almost destroyed the Federation all together.