"If you can depreciate the cost of an aeroplane over say 10 years, surely you can do the same thing with the qualification that you intend to use over x number of years..."
The Division 40 of the Income Tax Assessment Act 1997 (ITAA 1997) is very specific about what a depreciation asset is. This doesn’t fit.
Search for s40-30 ITAA 1997 for a specific list.