alex i'v never heard any thing like that in my entire life. herps do absolutly fine on frozen thawd rodents. unless you breed rodents and keep them very clean so they do not have any parasites at all then you should 100% feed them FT so the animals do not get parasites.
you also said feeding them frozen rodents there whole life is just like us eating noodles our whole life, that doesn't really make any sence cause the frozen rodents are still rodents, they didn't change into something else.
as for canned insects, they do lose lots of the good healthy stuff thats in live insects and canned is MUCH much more expensive than live.
0.0.1 tentacled snake, 0.1 brazilian rainbow boa, 0.0.1 black blood python, 1.0 jampea reticulated python, 1.1 yellow anacondas, 1.1 emerald tree boas, 3.1 BCIs, 1.1 ball pythons, 1.0 tiger salamander, 1.1 african giant millipedes, 0.0.2 cockatiels, 2.1 ferrets, 3.0 pet rats, some fish and more