I didn’t say anything about wearing beachwear in the snow.
You said the following:
Also, just because there's snow on the ground doesn't mean it wouldn't be comfortable wearing light clothes while outside.
Particularly if it's a cloudy day, and there's no wind, it'll be quite comfortable outside on a day where there's snow on the ground.
Well, since this was in reference to what she was wearing, which was two thin ribbons with feathers on them on the top half of her, we can only assume that's your idea of "light clothes". To me, light clothes is Dockers and short sleeve shirt. What she's wearing is the equivalent of beach wear. And no, I have never come across any situation where there was snow on the ground and she wouldn't be freezing in what she was wearing.
I saw the other people in the picture. The guy on the bike was wearing a jacket of some kind, it didn't look wintry but it could have been a jacket. The fellow in shorts was a problem, he didn't fit in. For what it's worth, I have seen people walking around in shorts in cold weather. Saw it just a few months ago, it was 30 degrees outside and a customer was in a store wearing a heavy sweater and shorts.
But the guy who really comes to mind is this fellow who lived in this upstate New York town I went to college in and lived in for a few years. We called him "Red Shoe Brown Shoe" because of his choice of footwear. As I recall, he also wore different color socks, (which are now in style, at least for women). He was also somewhat ahead of his time as he was an open gay rights advocate, which was pretty unheard of in the seventies in small agricultural college towns. Anyway, he walked around town in shorts all the time, even in the winter. Doubly unusual, as the town was located about 100 miles from Watertown, New York, the second coldest weather station in America next to International Falls, Minnesota. So while the guy wearing shorts in the photo would tend to indicate that it was too warm for snow, by experience I knew that it wasn't a sure thing.
Which still left the problem: Why is this girl dressed in the equivalent of beachwear in the snow? And if it really isn't snow, but sand, why change it to look like snow? They're selling a website in this ad, what's the point of throwing people off?
I can’t help it that the color of the sand completely flummoxed you and made you blind to anything else in the photo.
That's just it, it isn't
the color of the sand. It's sand artificially made to be the color of snow. No sand is that color naturally. But why, in an ad for a website?
There’s really nothing to kick around.
There's plenty to kick around. Maybe somebody who has done commercial photography or advertising might want to weigh in on why they did this.
It’s not startling or even unusual.
Maybe where you live, where you say people often walk around wearing beachwear or it's equivalent in the snow, this is not unusual. For everywhere else, this sticks out.