Perhaps you aren't familiar with the term. Graduate Student = someone enrolled in a Masters Program, Post doc, PHD program, etc.
This is quite different from a using a recent Bootcamp grad, likely without any industry experience, as a TA in a Software Dev Bootcamp. Especially because the main purpose of this is just to inflate job placement statistics.
Typically, getting into a graduate program is difficult and has an additional bar past graduation, and unless you are a great student you only TA entry level classes you have to master very well anyways. Especially in CS, graduate student is a paid job, too.
This is quite different from a using a recent Bootcamp grad, likely without any industry experience, as a TA in a Software Dev Bootcamp. Especially because the main purpose of this is just to inflate job placement statistics.