Recent research seems to indicate otherwise. According to a study, users who consumed cannabis, when compared with those taking a placebo, did not show any signs of associated apathy or laziness. The users consumed weed, on average, three or four days a week, so these findings are considered a breakthrough.
Additionally, the study, which involved 274 adolescents and adults, indicated that there is no difference in a user’s motivation for rewards, the pleasure they receive, or the brain’s response, when compared with that of a non-user.
Furthermore, another recent study comparing regular and infrequent cannabis users showed no link between regular cannabis use and low motivation, or laziness.
That said, both studies did indicate that the conclusions did not consider the far extreme end cannabis use, and how that might affect users in general.
Given these results, it’s important to keep in mind that you rely on actual fact-based studies instead of urban legends as to what the long-term effects of cannabis are.
Additionally, factors that help determine overall cannabis affects include the strain, the level of THC, the condition of the cannabis you are consuming, other food or substances you are consuming, and your overall health or state of mind.
You should also look to well researched studies published in reputable publications for reliable information. As there is so much hype and disinformation online, you need to be that much more careful about where you get your information.
Sources: International Journal of Neuropsychopharmacology, The Guardian, NIH