Advising a non-advisable friend

Honestly, what's worse?
Someone who thinks they know everything
or someone who keeps making mistakes despite your advises?
Those two characteristics aren't really that far apart
from one another in a handful of my friends or I daresay, acquaintances.

I have a rough understanding in how advising works.
It usually has to be from someone who you respect and look up to.
Usually if it comes from a peer, people will just regard it as nothing.
Unless you have a straight A+ or you're renowned enough.

It's funny because there were moments where I had already solved a particular problem
and I was going to advise them so that they have an easier time,
but all I got was a "I'll do it my way"
only to be asked "how did you actually do it?" later on.

What's even more annoying is that despite the extra effort you put in
to stop your friends from getting into trouble,
they'd rather take advises from someone who has a PHD
rather than myself, who has yet to get a degree whatsoever but still advised the same thing.

Does PHD automatically make people respect you more?
Does having piles and piles of money make people listen to you more?
Without a doubt, those two do come into play for some people, but for others like me,
it only works when it comes to research or maybe strategies in marketing respectively.

I don't really feel like I have to be thanked for giving an advice,
I just want to be acknowledged that's all.
Instead all I got was "Nah, actually the PHD student made me think it's a better choice."
Even though it's the same freaking reasoning behind it!

Ahh well,
I don't know how these people or I'll survive in the society.
People nowadays don't really give a fuck about a person who has a PHD,
sure, it's admirable to some extent but I find someone who's genuinely happy more admirable.

Of course, admiration is subjective.