Pop culture references also make this mistake (see "Everyone's at it" by Lily Allen), comparing taking antidepressants with the consumption of illicit drugs. This kind of finger-pointing could be a way to justify illicit drug use in the mind of the user, stigmatise psychiatric drugs to justify their own avoidance of help, or just reveal an overwhelming misunderstanding of the necessity of pharmaceutical therapy to people with mental illness.
Sure, people often treat their own symptoms with alcohol or recreational drugs, but this is never the assumption that is made. It is often thought that people are using prescription anti-depressants to avoid their problems or make themselves unnaturally happy, when anybody who has been on antidepressants knows that there is no such thing as an easy cure.
It is just so frustrating when stigmatisation of mental illness and its treatments is so openly accepted and present in the public media and everyday life. In general, people getting treatment aren't avoiding their issues, they are getting help for them, and anything that discourages this is just cruel and ignorant.