Birches; What is this called Poetry?

The Inquisitive Robert Frost said

the good fences make not only good friends,

But also make good neighbor. 

The wise man has a wisdom, 

But how often do they practice?

If swinging of birch in the cold is  idiocy, 

Then, there are some who 

"could do worse than be a swinger of birches"

Like a penny wise, pound foolish fathers at home. 

But what is this called poetry?