Since my polymorph meme has only garnered three downvotes so far I thought I'd offer a bit more controversial take, and see if I can manage to stir the pot a bit with this one.
That’s flavour text.
There is no concept of "flavour text" in 5e. If you believe there is, quote a part of the rules that says as such. In 5e, all of the spell description are rules and this has been debated many a times with the very same conclusion.