There is really only one reason why we can't legally keep some exotics. It's not because we're not big enough of a group to count either!
The green movement in Australia is enormous and will likely hammer even the slightest attempt to decriminalize exotics in Australia. This, of course, has nothing to do with the relatively minor threat posed even by corn snakes, which admittedly would pose some kind of environmental threat, even if it isn't any worse than native reptiles being released/escaped outside of their local range which it likely is not.
I would have no problem with people keeping corns provided they can provide they have experience keeping natives and have appropriate enclosures set up for their husbandry.
There are some large breeders in Australia who would like to keep exotics, but the number of large breeders who wouldn't want exotics are even larger - because they make more money and probably more friends in high places, so to speak. And the large breeders have large amounts of money to rig the committees and maintain the status quo. Those with the most capital will ensure they protect that capital, right?
Remember in 2001 there was a scare about IBD. We were on the verge of exotics being legalized after a "second" amnesty. The scare about IBD was a bunch of crap and everyone I talk to knows it was. The "second" amnesty went POOF and was delayed into 2004 when the amnesty was one where the animals were handed in and couldn't be kept.
Those behind the ban will come up with any argument they can use to further their own interests. If it isn't breeders it would be government department heads. Either way it comes down to the mighty ledger sheet, it's really all about money. Whether their arguments be disease or environmental threat. The fact of the matter is that there are far, far, far, bigger threats to our quarantine status and our environment than a small handful of people keeping corn snakes legally!
I used to be in favor of exotics, then I was opposed, then I had some revelations. Hell, some names were mentioned that I won't discuss for fear of personal safety. This is Australia and you're basically hosed if you attempt to bring down any corruption. But there is definitely corruption behind the exotics saga, make no mistake about it.
I wish I could say it wasn't true, but unfortunately it is true, and nothing anyone here says is going to change anything.
The sad part is that we could have flipped this nonsense on it's head, but I think we've missed the boat on that one. Maybe for a long time...hell, maybe even for good.
Yeah, I know. What idiots.
The same reason why exotics are banned is probably almost running parallel to the reason why cannabis is banned.
Someone, somewhere, will be making a lot of money, or a career, from the very fact that whatever happens to be illegal, stays illegal.
Hoteliers and beer breweries do not want cannabis legalized, neither do big pharmaceutical companies. Cannabis would cut into their market.
One could logically say the same thing about those in the current market in Australia. Exotics would slice into their market like a knife through warm butter.
Sad but true. It is what it is. C'est La Vie. End of discussion.