None of you seem to understand how protein is metabolized by your body.
In the span of a 1 meal digestion, an average male body can utilize about 30g of protein for various syntheses, like muscle production and creation of essential cells / fluids. Anything past that point is changed into calories. This all happens quite late in digestion, and depending on the protein's source, or amino acids, can occur very slowly. Things like whey and chicken are good right before bed because of how slow of proteins they are (prevention of sleep causing your muscles to go catabolic).
This means that correct amounts of protein are absolutely essential, because you can't make up for past protein intake since it has a soft cap, if you don't mind the terminology.
Carbs are quickly metabolized, but need fibers with them to be considered "good". Very little actual nutritional value apart from intestinal / colon health via high fiber.
Fats are slower energy, metabolized later, and much more calorie dense, making them more difficult to utilize but also more valuable, as they play an important role in your body transferring fat-soluble vitamins.
Milk is extremely valuable to people with crazy high resting metabolisms, due to it's insane fat content (whole milk is the only milk Veeky Forums will talk about, trust me), and valuable proteins with well-rounded aminos. The sugars are fickle, but if you're using milk to bulk, you obviously need all the calories you can get.
Whey protein, or whey isolate, is a very lazy way to get your protein. Using whey for your primary source of protein, at a properly done level, is so that you can focus actual food on high calorie, low satiety food with more fiber and nutrients. (Proteins have very low calories, but fill your stomach very much).
That 25g one scoop you took? Perfect to sate your protein metabolisation for the next 2 hours, but get some fiber! Get some fats!
It's all about doing things right.