The only reason it makes any sense for a government to ban, or limit access to, any particular substance is to save people's lives. Thus any law that, in theory or in practice, actually makes it more likely that someone will die of a drug overdose clearly defeats the only legitimate purpose for drug regulation.
As Utah law stands, there is reason to fear that some people who might otherwise have been rescued from a drug-related death will be left to die because those who are in a position to call for help won't. Fear of being blamed for the situation, of being arrested for possession or other crime, is just too likely to cause fellow users, or even casual passers-by, to flee the scene rather than call 911.
A few years ago, the Utah Legislature was presented with a bill that would likely have made the situation worse. It was a measure, proposed by Rep. Carol Spackman Moss, D-Holladay, that would have actually levied extra criminal penalties for failure to report an overdose, even as it did nothing to protect those in that situation from exposure to prosecution for other crimes.