This piece, from Joan Houlihan, should be of interest to those who enjoy poetry. By the way, I don't agree at all with some of her evaluations, but I do find them amusing.
On the other hand, the Billy Collins poem, though distinguished by its humor (an unusual, and welcome, attribute of contemporary poetry), is also a Mary Oliver poem, a Rita Dove poem, a David Lehman poem, and a Maya Angelou poem, among many other contemporary poets, because it is a poem we can understand. Immediately. We feel no drive to delve. It is not a poem we need to analyze. There are no pesky layers of meaning. What you see is what you get.