First I’ve heard of the allergen concerns thanks for mentioning it.
About 1/3 of the population has it. Wearing gloves and mask and doing all maintenance in open air will reduce effects. Remember like all allergies it can get better, get worst, or the same. Wearing gloves and masks just reduces the risks.
If you ignore them, like I did, you can develop and server allergy, and roaches will have to come off the menu.
#jamest0o0 concerns are 100% valid. If you allow them over populate and not provide other food, they will go after molting roaches.
But... If you overpopulate and don't offer other food, your roaches will eat their own.
The key here is don't overpopulate either roaches or dermestids, you will end up with problems. Every answer from the professionals are the same, don't let them starve.
https://rainbowmealworms.answerbase...and-or-buffalo-beetles-eat-cockroach-oothecae
Having a well rounded clean up crew of meal worms, isopods, dermestids, and roaches can create a system where maintenance and colony collapse can be kept to a minimum.
For a professional breeder that can spend as much time on their roach colonies as they do with their other pets, then they are not needed.