You're about 3 years late with this kind of rhetoric, and evidently us being 'Manchester United' has not had this kid clamouring eagerly to sign, despite our wooing and the large transfer fee, and no doubt wage, on the table.
The Manchester United you speak of is the one constantly challenging for the title; perennially in the Champions League; constantly signing the big names and playing dynamic football that leaves an impression on kids across the country and perpetually assures a renewal of fanbase and player admiration. Not the club in disarray and unsure of itself from one season to the next. You'd be a negligent parent/handler if you're not taking stock of the whole picture, both positive and negative, when handling your son's/client's future. If we're tabling £30m bids, then there's no question all the other top clubs, in England at least, are putting offers to him, too, which then ties in with my first post to you.
Prodigious talents don't need any one club - they have their pick and will choose in accordance with what they feel best benefits them, whether that's career path to 1st team football; financial security or something in the middle.
I don't know if he is coming here or not, but if he does, then it is a boon for us in the sense it sends a message to other talents of this sort that we're trying to build something that benefits them enough to opt in rather than go elsewhere. If he doesn't come here and goes to a 'now club' who look settled in the short and mid term it won't be as shocking as you're making out, however.