Nope. There is no grey area with a professional foul you either do it or you don't. There has never in the history of the sport been grey area around professional fouls other than whether an infringement is or isn't a try scoring opportunity:
https://en.m.wikipedia.org/wiki/Professional_foul
"The professional foul in rugby league embodies a similar concept to other sports, a deliberate breach of the rules in order to prevent a scoring opportunity. The penalty for this offence is 10 minutes in the
sin bin.
The majority of professional fouls are either holding down the tackled player after a break has been made in order to allow his teammates to reform in defence, interfering in the play when making little or no attempt to return to an onside position, or tackling or impeding the progress of a player not in possession when a try may possibly be scored. The latter situation may result in a
penalty try."