Easy. Basically most of those guys back then busted their damned asses simply cause they wanted to play for Parramatta. Not for Premierships, rep honours, recognition etc - sure those thigns would have been good - but guys like Mahon, Erickson, Crnkovich, Bartolo etc were all great Parra players who loved the jersey and had a heart for the Club.
these days guys switch Clubs at the drop of a massive cheque, or because of status etc. How many Clubs chased Bartolo? But he stayed because he was an Eel. Look at what Kenny did in his final year, turning his back on a good offer from balmain cause he was a Parra boy through and through.
Also, the great victories back then were so much better than anything the boys could do today. Why? Becuase today's boys are all superstars and down right outstanding players, so beating Brisbane at ANZ simply means 2 points and a slap on the back. Back then the boys were not massively talented great legendary Aussie players, and so beating Great Britain was down right bloody fantastic and outright amazing.
Also, back then I was actually playing footy and so it was those guys I looked to to learn the tricks and so forth.