I liked the answers "because I want to" and "because I can". No problem here with either one of those answers. I try to do what I want, too, and anyone who doesn't like it can go pound sand, and I admire others who are like that.
But I don't think a camouflaged gun helps a hunter. In fact, I asked the question because in the old days people didn't buy a lot of special clothes, much less camouflaged shotguns for hunting and they killed a lot of game. Many of them had to, to eat. I was looking in an old book about the history of my county and it showed local hunters in about 1900, who'd just bagged a deer. All these guys were on horseback around the deer, wearing what looked like suit coats and white shirts, (no ties though). They were all wearing brimmed hats, and carrying what looked like single barrel shotguns across their saddles. They had three or four deer dogs with them, but none of them wore any special hunting clothes at all.
A later picture in the same book was dated 1928 and showed two guys in a marsh blasting away at waterfowl. These guys had a Labrador retreiver with them and wore what looked like leather jackets under hunting vests with shotgun shells in the loops. Both men were wearing waders (hip boots, I think) but with the bibs hidden under their jackets. Both men were wearing ordinary fedoras (sort of like an Indiana Jones hat.) One of their guns looked like a Winchester Model 12 pump gun and the other was either a Browning Auto 5 or a Remington Model 11, I couldn't tell which from the photo, but it had the old-timey safety in front of the trigger guard.
If one of these guys had been using a SxS double-barrel gun, it could have been my own grandfather (b.1875-d.1960) because that was exactly how he used to dress to hunt geese. He wore nothing specially bought for goose hunting beyond a vest for his shotshells, and rubber boots. He wore a beat-up old fedora, which he was never seen without if he was outside his home. But I doubt if anybody on this forum will ever kill in their whole lives one-tenth as many geese as he killed in his. That's because for years he supplemented his small farmer/waterman income by "market gunning" for geese and only gave it up because of the ever increasing legal restrictions and the ever diminishing flocks, and after about 1905, increased competetion from other gunners with automatic guns which he couldn't afford, which eventually made market gunning more trouble than it was worth for him. But he had no special hunting clothes beyond a vest and boots, and he'd have laughed his a** off if he'd have ever seen a camouflaged shotgun.