Most people gain fat without control over carbs because they're not controlling other calories either. Refeeds don't slowly add carbs back in, and can have great upsides to the individual seeking body composition changes. Of course refeeds do tend to be at least somewhat calculated.
If someone is eating ~50% of their cals from fat with a say, 35% pro, 15% carb breakdown on 2000 cals/day, they'd be getting ~110 grams of fat, 175 grams pro, and 75 grams of carbs. Make the carbs and protein equal so the diet now looks like ~110 grams fat, 175 grams protein and 175 grams carbs (not anywhere near excessive for most athletes who do any glycolytic work) and you've got an extra 400 calories per day. Add in the water weight that each gram of carb. brings in (can't remember the number off the top of my head), and you can easily put a couple pounds on in a week. Yet, still less than 1 pound of fat, assuming energy balance is in a surplus.
Basically a long winded way of saying that if carbs go up, fat or protein need to come down. Preferably fat considering the benefits of increased protein intake.
Not meant to be an endorsement for high carb by any means, just making a point.
And if you don't think kettleball squat cleans are difficult, I say, step up to the med-ball
- CJ Kim