I think that statement shows a total misunderstanding of the role the Cowleys expect of their strikers.
Rhead playing deeper in the NL season, not scoring for a long while as a result but linking play and creating space for others to score, he was doing what his managers asked.
Likewise Green last season, a long goalless spell but ran the channels, stretched the opposition and opened it up for others, he was doing what his managers asked.
Akinde has more assists than open play goals, and by the Cowleys' criteria, he's definitely doing his job.
The Cowleys don't like to be reliant on one or two main scorers, indeed are perfectly happy for their strikers to be non scoring, I don' t think they work to rigid job descriptions.