Wan-Bissaka has been tipped to grow as a player if he joined Atletico Madrid on loan.
"The one thing Atletico would love is that he ain't gonna need much coaching about how to defend in one against one.
"He would learn a little bit more about unity within a back four in a traditional sense.
"Hopefully, he won't come back too ill-disciplined, cause there's always a chance when you go and play for Atletico Madrid for (Diego) Simeone. The way they play.
"But I think if it is going to happen, it will serve him well to go there and maybe to come back.
"It might be a really good move for him just to go on and play in that league. Maybe it will be a good learning process for him."
Parker continued: "Because after what's going on at Manchester United, in the way the press talks about him, he's been made a little bit of a scapegoat, to be perfectly honest.
"If I look at it, is Dalot a better player than Wan-Bissaka? No, he's not.
"No way, all-around, you're better off with Wan-Bissaka there than with Dalot, 'cause when you look at some things first and foremost you want a right-back who can defend and they haven't got that."