Parky, that figure was pre superleague, pre  full time players , pre sky monies,  you, and nobody else have any idea as to what average crowd the Rovers would attract should they ever get into SL. 
What average First Division crowd did Wakefield attract immediately prior to there elevation into the so called "elite" professional ranks ? 
I'll save you getting your Rothmans out - it was ; - 
1994/95    3,438 
1993/94    3,822 
1992/93    4,505 
1991/92    5,022 
1991/92    4,848 
  
Hardly way out in front of that figure, quoted by you, presumably, as a reason why Rovers could not make it in SL. 
How can you assume that the Rovers average gate could not grow as Wakefields have done ? 
I repeat you have no idea as what crowd Rovers may attract as a Full time professional outfit - and nobody else has either !