It isn't. The best drafting teams pick who they think is the best player. You can think it's stupid, that's your opinion, but that's just how it works. Whenever their pick comes up, they'll have a single player at the top that they want. They've had a really long time to argue about where these players should rank in their eyes. If you want to go for positional need, you do it outside the top 10-15. You say they have "tiers" but I can guarantee they don't have tiers at the top. They have guys they absolutely prefer. They've been watching these players for a long time. They absolutely have their favorites. If you don't go for the BPA in the top 10-15 (depending on the strength of the draft), you're shooting yourself in the foot for no reason. It's just so shortsighted and you risk setting your rebuild back for years.
Bulllshit. THis is not a science. There's not an exact measurement on this stuff.
Unless you have a guy who you believe is truly better - you draft the guy you need.
We've seen this over and over and over.
These guys don't know who's going where before them. They usually aren't pining for one guy that much over the other - anymore than you or I are.
The further away they are from #1 - the more likely it is they have several good options in front of them.
Maybe, from time to time, someone will fall from way on high on their list and be absolutely above the others by the time you get around to picking.
If you continue to draft wingers, over and over and over, you end up with a shit team.
Because you need centers and defense to win.
If you go 10 years and draft 1 LD and 2Cs and 0 RD in ROund 1 - you're going to have a shitty rebuild unless you get super lucky.