Why is there grammatical distortion in the poem'Grandmother'?

As this American-Indian poet has written this poem as protest literature he didn’t think that the standard of grammar would be in top priority than that of his emotions he had to express. There can be some grammatical distortion which can be pointed out. 

         First letter of any word in any sentences must be capitalized. But, the poem fails to use this formula and the pronoun 'I’ and also the first letter of word after the full stop has not been capitalized. Similarly, it lacks the use of coma (,) in 1st sentence after 'mile away’. In addition to that, 2nd sentence of poem itself isn’t complete. Hence, it shows the grammatical distortion in the poem.