there are degrees of risk -
and the reasoning that paraphrasing - "some group of people somewhere are promoting it - so its probably ok" is downright dangerous, in my view:
info on the risks with more authoritative references here:
"Chlorine dioxide is toxic, and limits on human exposure are required to ensure its safe use. The United States Environmental Protection Agency has set a maximum level of 0.8 mg/L for chlorine dioxide in drinking water.[46] The Occupational Safety and Health Administration (OSHA), an agency of the United States Department of Labor, has set an 8-hour permissible exposure limit of 0.1 ppm in air (0.3 mg/m3) for people working with chlorine dioxide.[47]
Chlorine dioxide has been fraudulently and illegally marketed as an ingestible cure for a wide range of diseases, including childhood autism[48] and coronavirus.[49][50][51] Children who have been given enemas of chlorine dioxide as a supposed cure for childhood autism have suffered life-threatening ailments.[48] The U.S. Food and Drug Administration (FDA) has stated that ingestion or other internal use of chlorine dioxide, outside of supervised oral rinsing using dilute concentrations, has no health benefits of any kind, and it should not be used internally for any reason.[52][53]
Many have complained to the FDA, reporting life-threatening reactions,[54] and even death.[55] "
https://en.wikipedia.org/wiki/chlorine_dioxidethere is no argument that in high enough concentrations it can kill 99.9% of all known organisms - so would a flamethrower - but that doesn't make it a good idea to use that on humans
methylene blue, Antabuse are not in the same category - they have long term safety data to support their safe use