I find the juxtaposition of the innocuous lead in ("text from my mom") with the rather unhinged text funny. The comparison to poetry, which I personally associate with peacefulness, adds to the expectation that it's going to be a pleasant text, which gets subverted spectacularly. I can also imagine the mom's encounter with the steak, resulting in them drafting the text to their child, which makes me chuckle because it's such a silly thing to experience.
It's less explicitly funny than a lot of things, but the subtlety doesn't mean it isn't funny. Humor is subjective and all, but there's plenty of funny to be found here for most people.

It's always fun seeing another Reddthat user in the wild.