Why would people in the 1800s find whitman's poetry to be so "revolutionary"?

In the mid-188’s Walt Whitman was considered a revolutionary because no one had ever written poetry like his before. His poetry was not only “free-verse” instead of a structured, rhymed writing style; it was also about the complexities of personal life, cultural life, and about things previously considered of intimate nature.

the message which is being conveyed is that if a person does not have the qualified skills to be an writer then he should not and if he becomes then just leave it away..

i think this is it plz check