For one thing...The whole protein thing is fucking completely out of control...I will say that. Protein is by far the most expensive macro.
IT ALL STEMS FROM THE FART POWDER ILLUMINATI! 10 SCOOPS A DAY!!! I know guys who are 200+ lbs and LEAN who don't even get 1g/lb. When they tell me their diet it's maybe 100-150g of quality protein per day.
It all stems from this "bulking" mindset...If you are gaining more than 1-2lbs per month you're getting fat. That is 12-24lbs in a year. 120-240lbs of muscle in 10 years..get real. You're a fatass. No one needs to be eating to gain fucking 1lb per week...Jesus you will be obese in 1 year.
Getting big is about CALORIES...Not fucking 500g of protein a day. 100g of protein will be completely spared by 800g of carbs in a day...where as 100g of carbs won't spare 800g of protein. Some of those aminos WILL be converted to glucose, so why eat it? Carbs are metabolic jet fuel (t3, leptin, ghrelin, etc.) Protein is for repairing tissue etc...
You can easily eat 200g of protein 400g carbs and 100g fat a day for <$10. That is 3,300 cals a day. If you need more than that drink a couple extra glasses of milk.