You need to look at the bigger picture.
This is a one-off exhibition match of which the talent is skewed significantly towards one team, there's no salary cap, no barriers to the type of game you can play and the type of team you select.
Clubs don't attempt to play one-on-one football because they don't have the option of playing 4 elite key forwards including sitting Buddy Franklin on a flank. This would be a very different set of circumstances.
This is like when I was a kid and I used to think that because Allen Jakovich kicked 11 one time, and Darren Brennet 8, and David Schwarz 9, and Garry Lyon 10, and Darren Cuthbertson 7, and Andy Lovell 8, that if they could all get fit they would be good for 53 goals in a game one day.
The fact you think a lack of quality tall forwards is why teams don’t play one-on-one says it all. Forwards need space to operate, the opposition dictate whether they allow your forwards to be one-on-one or not - if you can’t grasp that basic concept you won’t grasp anything more complex.