From TFA abstract:

  "For example, students often redirected questions from their peers
  to generative AI instead of providing assistance themselves,
  undermining peer interaction. Students also reported feeling
  increasingly isolated and demotivated as the social support systems
  they rely on begin to break down."

It's odd how easily an author can place two sentences next to one another without noticing a bizarre anomaly, contradiction, "begging the question", or raising a new stark question.

Here, we can reduce it to something like: Students feel isolated because they choose to isolate themselves.

I don't think the study or abstract is "wrong". just that it's missing something extremely important about the psychology and politics of "AI".