Because the medical community is well aware of the CTLM and knows it's a joke. IMDS has paraded the CTLM on every TV show, convention, and paid promotion there is for the last 19 trying to hawk it.
As you rightfully eluded, if any one of the hundreds of medical device companies or MNC's thought there was an iota of a chance the CTLM worked as claimed, IMDS would have been bought years ago.
"Sunlight is the Best Disinfectant" -US Supreme Court Justice Louis Brandeis