Thats all well and good but it doesn’t make teams pick who the teams talk up. Thinking that is fallacy.
Philly didn’t trade up for Fultz because Boston reportedly liked him. They traded up because they believed that Fultz fits their core better than other of the top 3 players.
Teams with the position of strength will talk up players to see what they can get from the teams that would trade up.
If Dallas is talking up Porter, the Kings sure as hell will not pick Porter because Mavs reportedly like him. They will pick him because they think he is the best prospect available at our pick.
Yes, this is true. But Philly did trade up because they believed that Boston really coveted Fultz, so they felt the need to give up a very valuable asset (ours or the Lakers future 1st rounder) to make sure that Boston would give up the player they thought Boston "coveted".
The moment that trade was completed, Danny Ainge proclaimed that the player they really coveted will still be there at #3 (Tatum).
If Philly knew Tatum was Boston's pick all along and LA was taking Ball, there was no reason to give up our 1st round pick to move up. Boston wouldn't risk losing Tatum by trading down any further than #3, they would had just picked Tatum #1.
The general consensus at the time was that Magic Johnson wanted Lonzo Ball. If Philly did not bite on Boston's perception that they wanted Fultz at #1, they could had stayed at #3 and possibly gotten Fultz without giving up a possible future top 3 overall pick.
The reverse could be said too. A team wanting to grab a player projected to be taken out of their range or right at their range would not want to highly tout a player to the media that they want to slide to them. Either they stay quite or they try to pump up other players.
It's not to say that Memphis doesn't like or wouldn't take MPJ if he was avaiable to them at #4 and their real target was already gone. I'm sure after the draft, they will just say whoever they drafted was their target all along (kinda like the Kings saying Fox was their target, but we may never really know).
But in general, I don't think teams that are not in a position of power, have any advantage of announcing who they really want, since they don't have control if that player will be available when they pick.