Who said anything about aim for them, you make up your list and as you check the names off, if said up coming pick fits the situation then you make you pick. It's not like they are saying I think this guy will only ever play on the 4th line, instead they are looking at what role he could fill and if that role ends up a 4th liner because that's where his skill level showed as he progressed through the ranks.
Bobrov said that they are looking for NHL players, they took him because of what role they think he might be able to fill in 5 years and based off the very little i've seen of him, he would be lucky to end up a 4th liner in the NHL full time (and a big win for the family to have 2 NHLers).
To me you 100% draft these kind of players if you think there's really something there and at the right time, which is tough to say since every draft class is different.
You can't draft a team full of Caufield's just as you can't draft a team full of Pezzetta's, which is why drafting 18 year olds is so hard and the stats so bad on the success rate beyond the 1st round.