I'm preparing for academic IELTS by writing some essays and then correcting those using a grammar correction app.
In the following sentence,
Therefore, despite kids tend to form unfriendly societies, it is necessary to gain this experience since it provides an opportunity to interact with people of the same age.
The app suggests using 'the kids' rather than just 'kids'. Considering the fact that I'm talking about kids in general as opposed to a specific group of kids, why is this so?