I understand the point you guys are trying to make but the decision to choose a 1C over a 1D in this situation defies logic.
Most defenders are chosen in later rounds simply because they typically take longer to develop so their skill does not become as apparent until they have experience in the NHL. Teams were not choosing true #1 defenseman because they are sure they would be available in later rounds. They just simply had a harder time identifying them. Many of them perhaps are not true #1 defensemen but simply very good defensemen. As most in the business would agree there are very few true #1 defensemen in the league as it is
Nicklas Lidstrom was chosen in the 3rd round 53rd overall. Part of that was due to unfamiliarity with European players at the time but it supports my point. Do you seriously think GMs are going to wait past the first round if they knew what Nicklas Lidstrom- one of the greatest D-men in the history of the game was to become? They are not choosing him in the 3rd round, most likely he would have gone head to head with the 1OA with Mats Sundin that year.
What you guys are doing is making one of the most common lay person mistakes in interpreting statistics assuming "correlation equals causation". You are assuming since many top defensemen are chosen in the later round that it would be safe to assume they will be available in later rounds. This is not the case and would not be the case if teams were able to identify top defensemen better. You are observing the effect of longer development times and lesser identifiable skill sets.
The key thing to understand that if a potential skilled #1 defenseman is identifiable in an NHL entry draft they almost always are picked at the very top of the draft if not at times #1 because they are extremely rare. Makar, Orr, Dahlin, Coffey, Potvin, Hedman. and Bourque were chosen early on because their skill was readily identifiable. Teams don’t wait for these players to be available later in the draft. They take them right away simply because they are extremely rare and play a critical role in any cup contender’s success. Schaefer's skill set at 17 is readily identifiable so it would be absolutely crazy for the Isles not to choose him at #1.