It's clear that many people do find marijuana helpful for certain conditions, for example terminal cancer, where the appetite stimulating effect can be useful i

It's clear that many people do find marijuana helpful for certain conditions, for example terminal cancer, where the appetite stimulating effect can be useful in helping forestall cachexia. So there are apparently cases where it is preferential to current drugs. But also it potentially threatens profits for drugs that are not currently developed. The alternative is to believe that big pharma is not threatened by a medication that is extremely cheap/easy to cultivate, relatively safe, and has proven as well ad potential widespread application. I think you are being a little obtuse in asking for examples! Just Google it - there are plenty.