Parramatta has been plagued by an injury crisis in its backline this season, and Arthur essentially ran out of specialist centres and wingers to play on the flanks.
"On the subject of everyone having an opinion, Brad Arthur copped it from the keyboard warriors for playing his son Jake at five-eighth and moving Dylan Brown to the centres," Gallen wrote.
"Those critics have conveniently forgotten Parramatta's injury crisis that has left them without a number of outside backs.
"Not for a second would I believe Brad Arthur would pick anything other than his best combination each week."
'That far in front it's not funny'
wwos.nine.com.au