I mostly agree with you and the frigid guy.
"Purpose of life"---if life has a certain purpose to a particular person, then life has a purpose to him, and that purpose is, well, whatever that purpose is. If another person doesn't feel that life has a purpose, then to him, life has no purpose.
This whole, "What's the purpose of life?" is a wrong, or, nonsensical question. The only things that can have a purpose are man-made things, such as, say, an organization. Life is not man-made, as such, it by definition cannot have any purpose.
This is sorta similar when people ask, "Why is there something instead of nothing?" This question is also nonsensical in the sense that these "Why" types of questions only work when directed towards humans. Only humans do things for certain reasons. The universe is not a human, therefore, "Why" types of questions do not apply. The proper question should be, "What caused there to be something instead of nothing?"