I think that's just a bit short-sighted.  I mean, I get it, he's been injured, and frankly Bagley spent too many games in college injured as well and it's a serious concern, but let me throw out some notes I took on him during the college season:
Then, following a different game:
That's just not a guy I give up on after two years, especially when those two years are full of injuries.  Again, there's a "made of glass" component to Bagley that scares me to death, but there haven't been many college kids I've gushed over like that since, say, Cousins.  And for as much as one can say that Bagley hasn't flashed the talent that Cousins has, I think it's fair to go the other direction and point out that Cousins doesn't remotely have the athleticism that Bagley has...and both talent and athleticism play a role in the NBA.
Look, this is a fanbase that is crying about letting Wenyen Gabriel go at this point.  At the same time, begging to dump Bagley for pennies on the dollar because he's not Luka?  I really believe a sober what-do-we-have-and-what-do-we-do approach builds this team around Bagley-Fox.  It doesn't look at Bagley as some sort of wasted pick.  If Bagley stays healthy, he's a perennial All-Star, whatever Luka is.  You don't dump him just because you missed a better boat.