The problem is that drafting young ruckmen is a long term commitment.
Unless you get an exceptional talent you really cant expect anything out of them from 4-6 years. You cant put all your eggs in that basket as it's a lot of investment if they don't work out.
Having an affiliate team rather than our own seconds make it even harder to develop our own ruck stocks as Coburg will no doubt have their own ruckmen and will not be willing to give a young ruck a run over them if they feel it hurts their chances of winning.
Geelong and collonwoood both have their own reserves yet their no 1 rucks are both imports, not developed themselves.
If we pick up a cheapie to hold us over until we can trade in something decent or until we develop a young un then i cant see a problem
Free agency will help in luring a decent ruck from another club in future years.
You never know, they might get it right and find a serviceable player for the right price.