> It's not right to call it withdrawal. These drugs are not addictive like benzos or alcohol are.
What does “not addictive” matter? Clearly, SSRIs are something that induce a dependency, because the withdrawal symptoms are horrific. A drug doesn't need to give you a high to create a dependency problem.
> If any symptom reappears it's just that the mental disease most usually changed form after so long time.
How do you know that? This is a problem with some other kinds of psychiatric medications too (certain antipsychotics for example), the reckless assumption that anything that happens after cessation of the drug was just an underlying symptom that the drug had suppressed. That could be the case, but you mustn't just take it for granted.
I think most worrying is the cases where a drug has only a placebo effect until the point of withdrawal. If your underlying bias is towards assuming the drug is effective, then the disaster following withdrawal might make you think the drug was holding it back this whole time. But in fact, the drug may have caused the entire harm.