Why do I still see these types of comments in the hobby?
Surely adding a measured ammonia source instead of live animals is just so, so, easy and it works. The science is simple. Ammonia source is cheap and readily available.
Why take the risk? or more precisely why risk the animals welfare? One of the consequences of using live animals is, if it goes wrong or you make a mistake, the animal could be put through extreme stress and even die.
What are the benefits of using a live animal compared to a measured ammonia source? I can not think of any.
What is so difficult about adding ammonia that would make one even consider using a live sample?
Nothing Voodoo about it, the concept of fishless cycling is just common sense and IMO shows a proper regard for the care of the animals in your charge. If you have animals you have a duty of care. It's just so easy to use an ammonia source , preferably a measured amount. The problem with using live animals to cycle your aquarium is when things go wrong. If you don't have any animals in your tank then there is no problem, just work it out or take your time. Also comparing ammonia to carbon dioxide seems rather bizarre. Why not compare ammonia exposure of your animals to ammonia exposure in your home. That would be a little more accurate. Ammonia is considerably more toxic to both Humans and Fish.