I'm a quality chemist. I test the API's that process chemists make to be sure they're right. Yeah, reactions don't always proceed as intended. These guys do understand the risks, and are only trying to provide an option. Here in the US the insurance companies are perfectly willing to let us die because funding expensive treatment hurts their bottom line. Unless you're independently wealthy, a small scale reactor at home may become the only option a person has available. Definitely risky, but why not take the chance when corporate America has determined you're not valuable enough to save?