Sure, but not wanting to go through withdrawal is different than being unable to stop taking a substance. In this case it's doubled because for most people SSRIs help them feel and function better and can have strong withdrawal symptoms, so most people wouldn't want to stop taking them because they are helpful and stopping sucks, not because they have a chemical dependency on them.

As someone on an SNRI for ADHD, I don't want to go back to how things were before I started on medication, and stopping taking it can be unpleasant to a degree (not to the same degree as an SSRI, but they work in similar ways in your brain).

Junior here is just being malicious misinformed and cruelly telling folks with metal health struggles that they just need to work harder to be happy, ignoring settled science showing that the vast majority of mental health dusorders (and neurodivergent disorders for that matter) are tied to physical and chemical differences in the brain compared to typical individuals.