One of the reasons why I liked Lindros is he refused to be chattel.
No one had to trade Lindros, they could have left him outside the NHL.
Leafs can draft whoever they want, but that doesn't mean Marner becomes property of the Leafs, just his NHL playing rights.
I agree with you that all these players are trade able but you are obligated to fulfill the requirements of your term and you can not force your employer trade only to one team (in this scenario it was Toronto) and he did the same thing when he was drafted and I believe (correct me if I am wrong) he is the only 1st OA pick to do that