According to the DEA: "Schedule I drugs, substances, or chemicals are defined as drugs with no currently accepted medical use and a high potential for abuse. Schedule I drugs are the most dangerous drugs of all the drug schedules with potentially severe psychological or physical dependence."
Both condition are obviously not true, and the conclusion is also clearly not true. Keeping Cannabis on schedule 1 only advances the interests of two groups: drug gangs and smugglers, and crooked law enforcement agencies.