Won't comment on your explanation regarding the manner in which you replied .
Let me put it like this, Lingard occupies the RW spot in our team, although it isn't a nailed on position like for example CB, LB, DMF, he still spends a large portion of his playing time as a RW, therefore he's by vocation a RW in our setup and on our teamsheet and the position that gets him into starting 11. Now if we go and get a proper RW, that RW won't replace Ander Herrera or Martial in team because "Lingard isn't exclusively playing RW".