Why do people think it is so crazy about not being sure if you want him? This isn't FIFA or FM, it is real life. He is already being called "best player in the world" so I would guess that slapped good amount of ego on him, and with that we could possibly see some clash with Ten Hag, maybe he could refuse to press as much as manager wants him to because he is "bigger" than our manager. Do people really think that situation is impossible to happen? And I would stand behind manager every fecking time, even if the player in question is prime Messi himself. Not saying it would happen but just saying there are many factors to consider, this isn't FIFA.
There is also question of that transfer pushing Rashford out of his best position, hindering Garnacho development etc etc.
I would rather have harmony in team than expensive toy just for the sake of it and for bragging rights. But I guess young generation don't get this. It is just buy expensive best players so I can brag to my friends.