Lee always argues not to take pitchers in the Baseball draft because of the wastage rate, but in the end you still have to have them, and you have to have goalies. Since good goalies don't get traded, it really doesn't matter if the probability of finding one in the draft is lousy, you still need to look for them. Copper ore is harder to find than iron ore, doesn't mean you can stop looking for copper because iron won't replace copper. Position players can't replace your goalie, you still need draft them. You can try to trade for them, but since they are harder to find than skaters, they will cost you more in trade-so the value prop ends up the same. That's what a market does.
The only draft round rule I would ever take as a good hard rule is don't look for QBs outside the top of the draft