I'd expand that a bit - how can you find a good approach for anybody based solely off anecdotes?
Finding someone with a similar age, height, weight, race, ancestry, metabolism, activity level, sleep level, gut flora, etc. to take advice from would be nearly impossible.
A dozen "it worked for me" stories without any form of control is effectively useless.
Also throughout the thread you see people saying "that's what worked for me, everyone is different". The underlying point is to eat a diet that satisfies your hunger to the point you feel comfortable without consuming more calories than you need for your daily activities.
People with a sweet tooth may need to avoid high fat, high salt stuff. People who enjoy fat more may need to avoid carbs. People who enjoy exercise may just need to exercise a bit more, etc.
Finding someone with a similar age, height, weight, race, ancestry, metabolism, activity level, sleep level, gut flora, etc. to take advice from would be nearly impossible.
A dozen "it worked for me" stories without any form of control is effectively useless.