I think you badly underestimate the extent to which cultural assumptions become inbuilt and internalised so that rooting them out is not the trivial act of insight or will you make it out to be. I also think you underestimate the extent to which these assumptions are particularly powerfully inculcated in women, who are trained from birth by culture to assume a subject position where effectively men tell them what to do or think. The problem is not that other people disapprove of you not having children, the problem is fighting your own belief that you somehow ought to.