Indeed. Stylistically there’s nothing at all wrong with that when it’s a choice. It adds flavor and interest to the music!
At the same time, for a struggling beginner it helps to learn the rules starting off, as well as the little tricks to help you get there. School bands sadly aren’t big on improv.
I found counting off each note to understand where it fits into the beat to be one of the most useful learning tools, hence I’m cheerful to pass it along to someone else who’s struggling a bit in the hopes it helps them as well.