If IT fails his physical and the trade is rescinded, the posters against the trade are going to be left wondering how we can replace our crippled PG and how much it would cost to replace him and suddenly the BRK pick for Kyrie is going to look more than fair to them.
This doesn't make any sense unless you think Ainge was trying to swindle Cleveland by dumping a hurt IT on them.
It's more of a thought experiment to show that the people against the trade aren't dealing with the reality of Isaiah's hip, and if they suddenly had to, they would change their tune. I have no doubt that Cleveland made the trade with full knowledge of Isaiah's hip's condition. The trade was really about Kyrie-for-BRK. If they get half a year of a hobbled IT, Cavs'll probably still be happy with the trade.
A lot people (myself included) would have a differing opinion about this trade if in fact IT doesn't come back healthy. I don't think one should just assume either or right now though.
Suddenly the trade seems a lot better now that IT might fail the physical, right?
If it doesn't get voided? Maybe. There's also the possibility that he could still come back after many months and be pretty good and get paid a lot less.
Failing his physical wouldn't necessarily be the end of the world.
