There are studies that show a sub-recreational dose is beneficial for depression and for chronic headaches. I haven't met a person yet that suffers from chronic headaches that is adverse to trying a low dosage.
That said, it's always best to do it with someone who has experience, remains sober, and can guide you in a positive manner. It can be easy to become caught in a negative place, although, maybe not at a small dosage, still ill-advised, in my opinion.
Definitely not bad advice. Especially if it's your first time trying to dose correctly. It could be easy to get it wrong and it would always be better to have a buddy; like these folks from Netherlands: https://www.youtube.com/watch?v=kz9yC6WkWA0