2 sets of McDonald's Meg mac set meal.

Using your reasoning, you also dont need whey to gain muscle, just protein surplus from natural food.

So those who always against hard gainers for taking weight gainers supplements, should also follow their own advice and stop taking protein supplements and instead get their protein from natural food. 

Of course there's a difference.

That's because their needs are different. So they take according to their needs.

1) A skinny/underweight guy who is already eating regular meals and still can't gain weight will turn to Weight Gainers for extra calories. His priority is to gain weight first.

No such thing, dude. Both can get from natural food.

1. "Bros" turn to weight gainer because they believe the supplement can build mass. As the product says "Mass Gainer". In chinese, they call it "Grow meat/muscle protein".

2. You can get sufficient protein from natural foods but it will overshoot the calories requirement if you're on a cut. That's the usage of whey protein.

I have nothing against weight gainer. I used it twice. We just need to educate these ppl that mass gainer is not weight gainer and whey protein is not a cutting supplement.

Weight gain = Calorie surplus
Cut = Calorie deficit

1. Who is to say/guess that "Bros" turn to Weight Gainer because they mistakenly think it grows muscle Mass. Can you read their mind? We are talking about underweight guys here. Isn't it more reasonable to think that they want to take Weight Gainer just to Gain Weight?

2. "Weight Gain - Calorie surplus". Isn't that the point I was making all along.

Go back and read my previous posts  . You don't understand the point I was making, because I used a lot of sarcasm in reply to Armesh's reasoning. Whenever someone asks about Weight Gainers, he just shoots them down without finding out what they require it for.

Talking Co*k again. The furthest thing on a 52kg skinny ectomorph's mind  is trying to look like Arnold because he knows the reality. He just wants to take Weight Gainer to gain some weight. Not everyone wants to be a wannabe Bodybuilder like you. Always assuming you know what's on people's mind.

You are just a 60+ kg at 175cm but talk very big as if a professional Bodybuilder. My advice to you, just give up your grandeur illusion and practice what you preach and stop taking Whey supplements. Just taking Whey alone and exercising your mouth won't make you anyway near a Bodybuilder