I guess you could conjecture that --- but Shaun Alexander set the record to date for TDs and was league MVP, so if you're going to use that season as your argument, I'll take the known vs. the hypothetical.
I do know that once the offensive line was shaken up with the departure of Hutchinson, there were no longer wide open running lanes, and as a result, Alexander struggled to put up numbers. It wasn't his foot injury, because look at his first three games in 2006 before that happened. Averaged less than 3 yards per carry, and less than 1 TD a game. He couldn't make things happen by himself.
It's been objectively proven that Dickerson could put up better yards and touchdowns in a season than Walter Payton ever could. But if you watched them play and look at the situations, you gotta say Payton was the better RB.
Either way, when I say he's the second best RB in team history, I mean that as a compliment, not a slight. We have had probably a hundred running backs or more on the active roster in team history, so that puts him well within the top 1%. So I think it's a compliment, and I'm glad he's in the ring of honor.