all of your arguements are valid in my opinion.
However, how do you account for offspring with well kept records, that came from extremely visually convincing f1 parents
Joe bashes the top chameleon breeders, but lets say you get a WC female that is gravid and she lays and you hatch her eggs...
lets say all of her eggs are extremely nice looking blue bar ambilobes on yellow background with red highlights....
Now you know that your wc female is a pretty pure ambilobe, with distinct blue bars, which probably couldn't be so unless your wc female, which you now know is an ambilobe was impregnated by a male that showed very similar characteristics, blue bar on yellow body ambilobe.
while you can't say for sure who the father was, you know that he must've been a nice blue bar ambilobe.... or else the offspring wouldn't be...and the same thing for the mother, if she produces perfect blue bar ambilobes, chances are very low she is anything but ambilobe, unless the differences between the locales was so slim it could pass
so now you have f1 CH offspring....
you can't say they are 100 percent ambilobe, but they are pretty damn pure, obviously if red body is your goal, you wouldn't consider them to be the great, but to a lot of people yellow body blue bar is a VERY desirable chameleon.....
now you go to another "top breeder"
who has similar clutch, and keeps good records....
whom you trust to rely on .... for a long time while your eggs incubate...
and you breed your f1 offspring with theres.... you have preserved genetics one step away from nature...and while they may not be 100 percent pure, neither is the wild locales interbreed on borders, they have to over the time of there existence....
and the chameleons you have produced are extremely nice, why complain? you have a fit species that has survived extreme temperatures pollution and capture....what more could you want?