I don't know any breeder that admits to freezing their healthy normals or hets.
I know what I do.
I sell them to petstores, I sell them at shows, or I give them to friends that can use them.
I know plenty of other breeders that do the same.
I have frozen animals that were not able to survive for whatever reason, and it is not a fun thing to do.
But the problem that I see is that even if just one person has admitted to doing it, that doesn't mean the entire industry does.
Take everything you hear on the internet and in gossip with a grain of salt.. Things can be misconstrued very quickly and spread like wildfire.
And know that no matter what happens, if you breed, you will not always get what you want. If you can't handle that, you need to revisit a few things within yourself and not blame the animals.