For a very long time, the NFL was ruled by the offensive and defensive lines. Nothing else mattered as much as controlling the line of scrimmage. As the years have gone on and the rules have changed, for safety and entertainment purposes, the quarterback has become head and shoulders above the most important part of a roster.
That doesn’t mean line play is not important but, the way the NFL is setup, it can’t be as important as the guy throwing the football.
The Cleveland Browns have invested heavily on both sides of the line of scrimmage led by DE Myles Garrett and OL Joel Bitonio.