I fully understand the distinctions. The fact is that teams are far more likely to scheme to get an extra man on Lee because he's so disruptive. You work that scheme and who does the guy come off? He's coming off the SAM
I could sit here and list schemes to combat how defenses line up
all day, but the offense and defense still have to have a base formation. The base formation of the offense
still dictates where players line up in the defense's base formation. The SAM is called as much because he lines up on the strong side of the formation. It is called the strong side because there is an extra blocker. The extra blocker is often used to initially double team and seal the linebacker, and then one of those blockers moves to the next level. Hence, the backer playing the strong side is
far more likely to see double teams more often than the WILL.
The fact of the matter is, if Lee is so disruptive from the WILL, teams are even
more likely to run to the strong side leading to even more doubling down on the SAM. That is one of the reasons Lee makes so many great chase down plays.
The reduced amount of double teams and blocks is precisely why they moved him to WILL, in order to take some of the wear and tear off of his body, further illustrating my point.
Also, I didn't say the SAM is the
only one who will see double teams, just that he is more likely to see them more frequently.