I'd disagree with that characterization. One, Lucky wasn't a bad seed. Two, he was most definitely already on his way out. They didn't spend a fourth on his replacement for nothing.
The story yesterday was just the nail in the coffin. The net result was the same as it was going to be anyway. And it was still a distraction right at the start of camp. Like Dez said, no player comes before the good of the team.
Bad seed in the sense that he had other issues that pissed the Cowboys off.
Only a truly naïve person can't see what happened here. Cowboys cut Lucky as message. Turns out they cut him for a crime he didn't commit. Then the Cowboys leak to some in the press that Lucky had other issues and that's really why he was cut.
And you are right, he was likely a cut casualty anyway. So why the rush to then cut him over something you didn't even know was true? Why not wait for the facts to come out, then cut him based on his performance? Instead, they rushed to send a message to the team and now have egg on their faces.
"The story yesterday" that got him cut TURNED OUT TO BE A FALSE ACCUSATION. How in the world can you then turn around and use that as justification to cut him? It makes no sense at all.