GoreTex works. Go out and work 10 hours in slushie snow with a steady rain coming down in generic water resistant clothes, then do it the next day in GoreTex. You'll understand why there's a premium and why it's so willingly paid by those who need it. You sweat as much as your body needs to keep it cool, rain is not as considerate and will gladly make you hypothermic.

Edit: That said, if it's warm and rainy, don't waste your time with a jacket and enjoy the ride.