No it isn't, beyond the trite fact that it settles the bet. The line does not have to matter in finding an edge.
Consider a line in a large market, like MNF. Let's say you don't know what the line is. Nonetheless you can safely assume that line is pretty fair, whatever it is. IOW, it doesn't matter what the line is, you can generically assume accuracy.
Now suppose you get inside info that the starting QB for one team is injured, and you already know his sub sucks.
You have an edge.
The line doesn't matter. You can assume edge without regard for the line.
You don't need to know who's at home, who's been winning or losing, what other injury info is out there, what the weather is going to be, nothing.
You can bet the line, no matter what it was. And if it moves 3 points against you, you know the info is out,
again without regard for what the line is.
There are plenty of times when you can assume edge without regard for the line. But believe me I know full well how offensive such thinking is to many players. People do get insulted by my approach sometimes, which is why I don't much like to post picks.
http://www.majorwager.com/forums/mes...rest-year.html