Yes, it is.
> For the people who believe it wholly, the effects that are claimed are marginal
No, the effects are not marginal. Research, the experience of basically all clinicians who prescribe antidepressants, and my personal experience all show they treat depression.
For a given person, an SSRI may significantly relieve their symptoms, have a mild effect, or have no effect. Across the population, studies of SSRIs consistently show they work to treat major depression [1].
Every clinician I've met has observed SSRIs being effective. They see depression symptoms getting better when medication starts, and they observe relapses when medication stops.
When I started taking Escitalopram, I stopped being depressed. When I stopped taking Escitalopram, I became depressed again. When I re-started Escitalopram, I stopped being depressed again.
My grandfather had the same experience. When he went on Citalopram, he became calmer and less irritable than he'd ever been in his life. He stopped taking Citalopram for a few weeks, because of a physical illness that interrupted a prescription refill, and immediately slipped back into a depression. When he went back on Citalopram in the hospital, he was smiling and singing again two weeks later.
[1] https://astralcodexten.substack.com/p/all-medications-are-in... https://astralcodexten.substack.com/p/all-medications-are-in...