Mate, "Inside Forward" role that is available to AML/AMR positions greatly loses in efficiency to "Wide Midfielder" role that is available to ML/MR positions.
Guys from SI coded these roles to be like that and we can't blame them for that
because no one promised us that all roles should be equally efficient so there always will be more efficient roles and less efficient roles in FM.
If we compare "Inside Forward” and “Wide Midfielder” roles then we'll get this:
Inside Forward (Support ) : Defense =
AVARAGE; Attack =
POOR
Inside Forward (Attack) : Defense =
POOR ; Attack =
GREAT
Wide Midfielder (Attack) : Defense =
GREAT ; Attack =
GREAT
Wide Midfielder (Support ) : Defense =
GREAT ; Attack =
POOR
So at wide positions in this tactic I want to have "Attack" duties so it’s obvious that I go for Wide Midfielder (Attack) because it's "Great" at the Attack and the same time it's "Great" at the Defense.
If we go for Inside Forward (Attack) instead Wide Midfielders (Attack) and in this case the attack will be the same efficient but the defense will be just awful.
If we go for Inside Forward (Support ) instead Wide Midfielders (Attack) then we decrease the attack and the defense.