No, I'm happy with the question ''Is there a purpose to life?'.
Your discomfort at this question is evidenced by you dishonestly describing the question as an assumption that there is a purpose to life. The idea is enough for the question to be legitimately asked.
That would be the point where you beg the question 'is there purpose to life' in your question 'So the meaning of life is found in the library" - that's not my dishonesty (nice ad hominem, by the way) but the implication of your phrasing. The idea might be enough for the question to be asked for you, but unless you demonstrate there's a reason to presume there is an underlying reason I can keep pointing out that you're question begging.
That you wish to prevent it being asked is intellectual totalitarianism on your part.
Yeah, my pointing out your unwarranted assumptions is 'intellectual totalitarianism'... is that the new 'philosophical naturalism'?
O.
The question is a legitimate one because we humans naturally create a narrative for ourselves to engage our being into the community in which we live, and to do this our society and culture has to be given some form of 'solid' meaning and foundation, some ultimate clarity and form, and therefore, purpose.
The real underlining question here is why do we sublimate this into some spiritual, 'cosmic', entity; into a 'bigger picture'? Is there a valid postulate here that we are part of something greater than our community's day to day functions and customs? Many people do feel that there is more to life than just earthly things and that it consists in something way beyond our myopic bodily and terrestrial needs.
And also, what do we mean by purpose or meaning?