Did Eliot say that poetry is the purpose of human beings?

He didn't say that.

Eliot emphasized the objectivity and practicality of poetry. His theories of "tradition", "impersonality" and "objective counterpart" are based on the objectivity of creation. His later works are full of religious thoughts, trying to purify people's hearts with religious ethics, so as to achieve the purpose of transforming society.

Eliot's poetry creation and theoretical research are carried out simultaneously, which is closely related to philosophical research. He is a poet, philosopher and critic. At the same time, he also emphasized the function of feeling and the combination of reason and emotion. His poems are practical "social records". Nor did he say that poetry is the purpose of human beings.