I don't mean to sound condescending but why does everyone think that Benning only scouts amateur players and not pros? I'm sure the overall process is very similar, he just has better footage and intel to use in his analysis.
If we filled our roster with nothing but draft picks we'd have a bunch of kids who would have nothing but each other to fall back on. A lot of these draftees have never played an 82 game season, don't give post game interviews, have no previous experience in the pressures of playing at the NHL level and frankly don't have the structure and discipline to be both physically and mentally prepared to bring it every night.
What's happening now is a transition from a 30 something core to a 20 something core. Just because guys like Sutter, Gudbranson, Markstrom etc aren't 18-21 doesn't mean that they're done developing and growing into pro hockey players. We're accelerating our rebuild by about 3-5 years and even though they haven't made the show yet doesn't mean that we don't have elite prospects as it is. The only way to get these guys in the 22-27 age range in a salary cap league is by giving up draft picks so unless we want a decade of Oiler hockey we're going to have to make some tough moves.