Yes, chickens have been chickens for a long time, but now they are domesticated birds that have been bred for a very long time to be what humans want them to be, so that argument is the same as saying that dogs have been wolves for thousands of years. You could also say that chickens have been dinosaurs for thousands of years. Neither one makes much sense. The reason that some breeds stop laying in the winter is that winter is a terrible time to hatch eggs. Many breeds of chickens were bred to lay all through the winter, so this doesn't matter one way or the other. I don't think that needing a rest comes into it.
You won't prevent a moult by putting in a light bulb. The hens will moult any way. And if they were going to do it, they would have already done so in Wisconsin. Hens don't moult in the winter for obvious reasons. Most birds will be growing their feathers in now after a moult, not losing feathers.
What you will do is mimic a few extra hours of daylight and get more eggs. This is a huge controversy, so all I can do is tell you my feelings on it. Some people believe that if you light the coop during the winter, your chickens will stop laying or become "spent" sooner. I'm not sure if that's true or not. I light my coop in the winter because I want the eggs, and they are chickens, and I am taking care of them in return for eggs. I don't think it's doing them any harm. One 60 watt bulb on a timer so that it comes on at dusk and goes off a few hours later will do it. They don't need light all night, and in fact it can cause pecking if they don't get some darkness.
I keep most of my layers for only three years, so them being spent sooner doesn't bother me. And the hens I keep longer are because they have some trait I want for breeding, so them having fewer eggs later in life doesn't really bother me either. They're not going to drop down dead because they had a light on in the winter, they're not going to get sick, they just will lay more eggs now and maybe fewer eggs when they're older.
In the end, it's a personal decision.