This statement is gross and rooted in bigotry of low expectation.
AFL is 10% Indigenous. Many of them come from remote communities including top end/Tiwi Islands and they are all able to be compliant with ASADA/Illicit drugs policy.
There is also another aspect you aren't considering. If Willie turned up to the AFL tribunal and tried to use his Indigeneity or culture as a mitigating factor, every other Indigenous AFL player would be dirty as fu** with him, and Willie would be very aware of this.
In saying that, people are going way overboard with this. Willie will get 18 months and be back in time for preseason 2021 at the very latest. I wouldn't be surprised to see him back on the field some time in 2020.
Just call it naivety, boy from the bush type of thing then.
Otherwise you are just saying that the penalty for sample tampering is 18 months and not 4 years and I don’t know how you get there.