Here's the thing, when we actually know a player wants to leave Juve, Juve makes it work for the benefit of the player after they express explicitly they would like to move on. With Tevez they found a way to make it affordable for Boca to bring him home and they also got first options on prospects in return for playing ball. Pirlo expressed wanting to move to NYC, they made it work. MLS can't afford huge transfer fees but they can afford decent wages for "designated players" and it all worked out.
We still don't know if Pogba wants to leave its still all an assumption, he's also a World XI player who they didn't want to let go. They put up a crazy valuation probably thinking no on would ever pay that but United are desperate + Mino's involved.
Everton should want to play ball because they may want a player from us in the future, they may want to take a youngster or youngsters on loan in the future, they don't want to scare away top talent and future prospects who feel like they aren't an organization worth dealing with.