Many of you really have me scratching my head. And again, really, really putting words in my mouth, or more correctly drawing your own incorrect conclusions on what one person is saying but not another. I am getting whiplash trying to keep up.
I am pretty sure no one needs an 'island' analogy as most people have experienced depression to some degree. And it they haven't, they will at some point in their life.
I know the definition, have read it probably hundreds of times (for my own purpose), and it always comes away quite circular. "You can sort of be down but not for too long or too much but there is no hard definition on how much or how long until you are officially depressed". Classic medical mumbo-jumbo for "I really have no clue what exactly it is". Trust me, it you can find an island to stand on, you are not depressed, Now if you are treading water...
Who said anything about "just getting over it". You make it sound okay just to stay in a funk permanently and never make an effort to get out of it. Of course people are different. Some can handle adversity better than others, some choose to set in a state of depression, that is on them. I say that as a matter of fact, not to hate OR love on them. It is really that simple.