It would have been very helpful for people to have suggested these combos as potential exploratory treatments, rather than simply jump on this person. There must be some degree of pragmatism when it comes to veterinary care. Presented with the option of spending $300+ to treat a snake that for all we know might be a normal he rescued from a petshop that had no intention of treating it, I might be inclined to try an exploratory treatment myself.
...and yes, I do think that there is a fair amount of high horse riding that goes on....but i did edit my comment because plenty of tantrums are had as well.