That is usually the argument made by those that oppose narcan use but it has been debunked. Opioid users dont try to OD, but they will use the drugs with or without narcan available to them and doses are not standardized so ODs are inevitable.

There are some correlations like increased ER visits when narcan is used that are often pointed to as an argument against it however that is expected when people are found alive rather than long dead thanks to narcan. Kinda like how helmets increase head injuries, because they are actually preventing deaths.