How does the beginning of the poem establish the purpose in Brewster''s "Where I Come From"?

This poem purports to be a contrast between city and
country. At first reading, the poem’s speaker seems to be elevating country living above
city living. However, the concluding two lines come as a contradiction of this
idealization, and for this reason create surprising final twist. The poem’s first eleven
lines establish details that support the opening statement that people are “made of
places.” Thus, their very outlook on life is conditioned by the areas from which they
spend their childhood and adulthood. Even their very thoughts and ways of looking at
life are inextricable from their locations. People who work in “chromium-plated offices”
assume that it is natural for human existence to take place exclusively in such an
environment, just as people riding subways at rush hour accept the premise that life
might usually take place where there are always crowds. Interestingly, while most of the
details about city life are negative, the poet does include details about tulips and
fountains—but these objects of Nature are regulated and organized, and are not growing
without human intervention and control.