But that’s how PR works- it’s not as cut and dry as that. Let’s say you have 3 scenarios- good, bad and nightmare. Fans want the good one, but if that’s unrealistic you leak the nightmare scenario so when the bad one happens fans thanks their lucky stars and say “things could have been worse.”
As to your second point, this is just how leaks work. Arsenal will never actually have to say that the best players want to leave. They leak a little sniff of information to the right journalist (maybe indirectly) knowing they’ll create a suitable (bull)shit-storm, which the club can then brilliantly avoid to appease the fans.
I’m not saying that’s what’s happening here but it’s worth considering.