You could throw that at most clubs though, with the exception of Real and Barca. Nothing has ever really changed, every team is happy to sell if the price is right and always will be. The only real difference is clubs have lost their backbone to some extent and allowed players to dictate what happens, it should be a negotiable position, but I think its gone to far towards the players.
I get the sentiment like. But, at the end of the day, they are employees and deserve the same legal rights and protections as you or I.
If i wanted to leave my current employer (even if doing so would make me a tit and leave colleagues struggling) then i am and should be allowed to do so.