You view of these things don't converge with my experiences at all. The flue-like 'withdrawal' from ssri's is not nice, but it is peanuts compared to drugs with a misuse potential like opioids. Opioids rewrite your brain's reward system, the withdrawals are excruciating, and your former addiction will be a part of you for the rest of your life.

As I wrote having first and second hand experience with both kinds of withdrawal I think talking the danger of opioids down while talking ssri's up is wrong and dangerous.