can botox treat depression along with wrinkles?

i read that article on the internet because it's so funny title i've ever seen.
how does botox treat people's depression?
before i read this article,it's just interesting for me.
However, after reading, i felt we've missed something very important in our life.

Briefly, there were 10wome. they were interviewed by psychologist who said that they were depressed. also, they filled out depression survey.then 10 women got botox injection.
2 months later, they repeated depression survy and interviewed with psychologist.
9 women,their depression have lifted.
10th women still had symptoms of depression, but she showed improvement.
anchor asked question the chemical itself in botox or something else that erased depression. answer was no one know but solid theory is that it's a social reaction.
Social reaction! i think it's important point.

for example, you smile, people smile back at you.
but it's the case of beautiful smile.i mean you smile beautifully, people smile beautifully back at you, whereas you smile ugly, people smile ugly back at you.
there's social feedback that is triggerd by your facial expressions.
i think one of the reason is mass media such as TV and internet.
every day,people watch and contact with tv. in the tv, there are many men and women who are nice,sexy and who have beautiful face appearance. as many people watch tv more and more, they are affected by tv even though they couldn't perceive.
so if they get old and get wrinkles, they will compare with themselves and other people who are seen by tv. it's possible and it's more common today especially for young people.
how about think about hidden fact behind the botox injection?
that's not a just sort of treatment,i think~