Rant Against Ignorant Advice

Sorry if this is the wrong place for this...just gotta get it off my chest.

First of all, where do people get off giving fitness, health, and food advice to other people based on
a - what they've heard Word Of Mouth from others
b - Google
c - their own experiences with their own body
...all of which are bound to be completely irrelevant to the person they're giving advice to?

For example, how does it make sense for my 200lb male friend--with hypothyroidism I might add--to tell ME, a 5' 5" 130lb female, what I should be eating and when??? (yep, the cause of the rant, right here folks)

That convo went something like this:

Me: "I've been eating more protein.
I think part of the reason I was so sick last summer was because I wasn't eating enough."

Him: "You need to eat most of your protein in the morning,
and eat carbs the rest of the day to keep your energy going."

Me: "What? Why?"

Him: "That's what I do. I have a protein shake every morning before my two mile run.
Here, I can give you the recipe."
(reads off recipe while I type it into my handy-dandy mfp app)

Me: "Your protein shake is 600 calories, with 60% from carbs and 40% from protein."

Him: *HUFF* Well, take the fruit out. And add in spinach, I forgot the spinach."

Me: "That aside, all of the stuff in your shake could just be eaten throughout the day, as part of meals.
Why can't I just have the yogurt and fruit for breakfast, the egg and spinach for lunch,
and some chicken and veggies for dinner? What's the benefit of eating all the protein at once in the morning?"

Him: "That way, your body can process it all at one time."

Me: ".......gotcha." (not even going to get into how the body flushes nutrients it can't store)

FYI the KICKER for all this is that the recipe for the shake was given to
my 200lb friend with hypothyroidism by a mutual friend of ours,
a TOTALLY ripped ex-Marine who works out like MAD every few hours (no joke)
and probably has to eat TONS of protein to compensate.

Do you understand why I'm irritated, mfp?
I'm just trying to make healthier life choices and get my diet balanced.
WHY on EARTH is a 200lb overweight male giving me diet tips that HE uses to LOSE weight,
given to him by a 180lb lean musclebuilder trying to GAIN weight?! Unbelievable!!

I'm sure LOTS of people can share a similar experience.
People LISTEN to their friends, and CARE about what their friends say.
So even if your friend is a bodybuilder and you're just Average Joe,
you probably at least consider your buddy's advice.

After a post like this, I'm not going to sit here and tell ANYONE what to do, or even make suggestions.
So...In My Uneducated Opinion, if you're not a health professional,
It's probably Not A Good Idea to go around telling people what they MUST and MUST NOT do health-wise.
It will eventually make you look like a fool, esp. when you're a 200lb man
telling a member of the opposite sex who's 2/3 your size to eat like you.

Rant over.