I would say that actions that make a particular person happy can have consequences that decrease the collective happiness of some group. I might use a tyrant or an addict as examples. In answering the question "What else are you gonna do?" I'd propose at least "As long as you harm no group happiness, do what makes you happy," the Wiccan Rede "An' ye harm none, do what thou wilt" probably being too strict (rules out being Batman, for example).

When someone is about to be a parent (I think this question stick more to a man than a woman, considering the empathic link that's been biologicaly created between a child and his mother) is he really asking himself: Will they worth it ?

I think the situation is very different planned vs. unplanned. For me, once the decision was made I had no second thoughts. Also, the little munchkins re-write you emotionally once they arrive <- no one told me about this, so it was actually a bit of a shock.

Often helpline workers are people who formerly needed mental health advice themselves. At least, they'll have training on how to be helpful. I think it's very likely they'll be supportive, and unlikely that they'll be judgmental.

However, this is from a US perspective. Things may be different in other parts of the world.

That strategy has a good chance of discouraging her from getting treatment later.

Why do you say that? Also, if she is distressed, then she may want treatment now.

Getting her to call a mental health advice line that she doesn't trust likely won't be positive.

Granted, but why won't she trust the mental health advice line? If she is distressed, she may be willing to consider help from new sources.

If she is not distressed, then CronoDAS can use the mental health advice line to get educated on the options in case she does become distressed.

I think "all human interaction is manipulation" is false on its face. I was putting forward Adler as a candidate for being a modern root of this meme. His teachings are still quite influential.

If she is distressed by the symptoms, you could encourage her to contact someone that can educate her about treatment options. There may be a mental health advice line in your area that can refer her or you to free or low cost resources.

My understanding is that Alder thought we all start with an inferiority complex because we all start as small, weak children.

He was the inferiority complex guy ...

"The striving for significance, this sense of yearning, always points out to us that all psychological phenomena contain a movement that starts from a feeling of inferiority and reach upward. The theory of Individual Psychology of psychological compensation states that the stronger the feeling of inferiority, the higher the goal for personal power." (From a new translation of "Progress in Individual Psychology," [1923] a journal article by Alfred Adler, in the AAISF/ATP Archives.

... everything is about the struggle to gain power over others, which can become pathological ...

"The soul under pressure of the feeling of inferiority, of the torturing thought that the individual is small and helpless, attempts with all its might to become master over this inferiority complex. Where the feeling of inferiority is highly intensified to the degree that the child believes that he will never be able to compensate for his weakness, the danger arises that in his striving for overcompensation, will aim to overbalance the scales. The striving for power and dominance may become exaggerated and intensified until it must be called pathological. The ordinary relationships of life will never satisfy such children. Well adapted to their goal, their movements will have to have a certain grandiose gesture about them. They seek to secure their position in life with extraordinary efforts, with greater haste and impatience, with more intense impulses, without consideration of any one else. Through these exaggerated movements toward their exaggerated goal of dominance these children become more noticeable, their attacks on the lives of others necessitate that they defend their own lives. They are against the world, and the world is against them." (From "The Feeling of Inferiority and the Striving for Recognition," [1927] a journal article by Alfred Adler, in the AAISF/ATP Archives.

Perhaps look at https://en.wikipedia.org/wiki/Alfred_Adler ?

I feel like there should be some constraint on harming group happiness while you "do what makes you happy."