> They are 75% carbs.

75% of the calories in broccoli is from carbs, sure, but because the overall calorie content of broccoli is so low, it's still considered low carb.

https://www.nutritionix.com/food/broccoli/1-cup

A 1-cup, 156-gram serving is 55 calories, 11g carbs, and 5g fiber, so is only 6g of net carbs for keto purposes.