If the wind is blowing hard enough to make it a chore to carry my kayak to the beach on my shoulder, then I ain't going out. I've had a time, or two when the wind came up during the day when I was out paddling and I at least had to consider an alternate means of getting the boat back to my rig, but the wind always dropped off.
Generally I'm pretty lucky to live where the wind very seldom blows too hard to paddle, except in a storm. I have zero interest in being out in a storm. Anyone who claims to be able to paddle into a 30 knot wind for more than a very short distance is probably wrong about the wind speed.