Because you think Holmes is an amazing talent does not instantly condemn those from a previous era to rank amateurs.
All the remarkable things people look at today and applaud were done in similar fashion years ago the trouble being little footage to review so you had to be there to see and appreciate it.
A few examples
Bishop and Millward could run 1 direction cross kick to the corner and the winger score in the corner in the 60's long before Andrew Johns, Billy Slater.
The greatest no try of all time Langlands running from the 25 diving into the in goal and catching the kick from Dennis Ward on the full (actually available on Youtube). Again long before all this diving from the field over the dead ball and side line tapping it back.
Johhny "The Bomber" Peard putting the ball into a position that was almost indefeasible for his running backs to leap and score. Long before all the versions seen today.
Langlands catching the ball in the St George in goal, side stepping 4 players to pass to Gasnier to pass to Trevor Lake to score at the other right on half time against Souths at the SCG. Long range tries by real speedsters Irvine, Cleary, Mullins, Boston, Lumsden, Gasnier were not uncommon.
Ken Irvine's try scoring record still unbeaten today and anyone who does beat it will have played a hell of a lot more games. His ability to hug the sideline and beat players with blinding speed long before the Hayne tip toe run. Irvine's strike record for tries akin to Bradman's batting average "out of the realm of normal players".
Team kicks out on the full from the kick off was often a mandatory kick at goal from half way Barnes, Simms, Longbottom, Batty, Langlands, Puig Aubert to name a few.
All of the above with a pig skin football subject to being water logged and mud covered.
Last but not least Vince Karalius, Noel Kelly, Kevin Ryan & Rocky Turner would easily shape up to any of the toughies from the modern era and hold their own either in the ring or behind the grandstand.
Ask yourself a different question "who in todays game could go back in time, train twice a week only, not use drugs or equipment to enhance performance and hold down a full-time job" and be as good as they were?
Actually a very good post