I disagree to be honest. If anything I see this as Ed pushing fans to believe that all we have the money for is one signing, especially if it's big. Sancho is the heir apparent to being the Rooney, Beckham, Gazza type of English football. I don't think there is any doubt that any big English club want to do anything to bring the lad in as soon as possible. His potential earnings for any club (especially English clubs) are huge. The lad is that big a talent. The way I see it is that a lot of English clubs were linked but we now have Chelsea signing Ziyech and Liverpool seemingly buying Werner. In my opinion both of these clubs would rather Sancho so there must be something pointing towards United as his choice (the lad has shown he is smart about his career so maybe the fact he walks into our team no problem is a big thing for him). If we don't sign him I'm almost fully certain that it won't be because we weren't willing to pay his value. His long term potential value to the club is too much for that.
Maybe it's a point in the direction that we intend to sell Pogba but only sign Sancho in his place. It could be anything, including a negotiation tactic. I simply don't think Ed is stupid enough to not realise how valuable in the long run having the next generational English player who just turned 20 is to a club like ours.