Form my own experience, I have never used pot heavily or for extended periods without intermittent breaks.
I use what I call homeopathic amounts.
about two good tokes , twice a day, a couple of hours before my main meals is the norm.
Thats all it takes for me to get an increased apatite and mood elevation.
Such small amounts wont turn you into the stereotypical stoner or cause negative side effects.
Some people genuinely don't like its effects while others smoke it daily for their entire adult life
(Different tokes for different folks)
Its about personal choice and freedom, I will not advocate for universal use of marijuana here, but for people who have chronic issues with apatite or even other mood disorders or for those who just have trouble mellowing out, I would recommend it be used as a safe alternative to prescription drugs, that has an excellent track record of safety going back since before recorded history.