I think that is just spinning things to justify why they are not reissuing certain molds. It is clear that it is fairly easy/inexpensive to recreate and mass produce molds at an industrial scale or we wouldn't have so many knock offs that are of comparable quality to Tomy's/Hasbro's.
The 3rd parties also seem to get up and running creating their own molds reasonably easy enough.
I think that is just an 'urban myth' that Has-Tak created to justify why they don't reissue certain figures. It could be that they simply couldn't be bothered to fix/recreate molds they don't readily have.