I actually love the wind and the rain, we joke that in a past life I was a highland sheepdog.
I have also had many bouts of depression in my lifetime lasting years.
SAD still affects me like any other bout of depression I've ever had in my life to the point I can't brush my teeth and my hair, I can't stop myself crying, I want to get off this planet by any means necessary, I don't shower, if I have enough energy to get in the bath, I don't want to get out and I just sit there in human stew with minimal scrubbing or washing.
It happens every winter without fail and it's more to do with short days and longer nights.
We do undertake mitigating measures, as both DP and I are affected in our individual ways, and it's taken us a long time to understand what is actually triggering these long episodes of depression in winter, but I think you're really privileged if you find you are able to get up every day and make a good concerted effort at exercise, getting out in the sunshine during daylight hours, and can power through until March and understand that there's a light at the end of the tunnel and keep hold of those highly rational thoughts.
It's horrible feeling like the depression has lifted and you hope it's for good, and then the next dark season comes along and you feel like you're back at square one. It's the longest game of cat and mouse.
There's a huge difference between not liking it being dark and grey and wet and windy to feeling hugely incapacitated by it. Please don't downplay anybodies experiences because you think it's just a bit of a buzz word.
But yes, SAD lamps do help us. They're one of many very useful tools that help us create rituals that help stave off the worst bits and they're the very first thing we use in order to move on to the next thing, and the next thing.