I'm not saying I'd be ill or die or something if I didn't eat this
much protein, but it is certainly a fact that I feel more satisfied if
I eat higher levels of protein, and that proteins are what I most
crave when hungry.  I am also healthy and not overweight.  I never
skip breakfast.  Your way may be better for you, but that doesn't mean
it would be beter for me.  Do you have a psychological reason for
eating less protein?  If not, why do you suppose I should have one for
eating more?

There's something you aren't taking into account - Not how filling a
meal is in the short term of the next hour but how long a meal
prevents hunger from coming back, and that is different for each
person.  The terminology is very poor but the word "satiating"
tends to mean not current fullness but how long before hunger
comes back.  Fat and protein are both more satiating than any
form of carbs.

Also keep in mind that "an ounce of prevention is worth a pound
of cure" and if you have a meal specifically chosen to prevent hunger
for as long as you can it makes keeping your total intake for the day
under better control with less effort.  So it doesn't have to be about
failing to make the minimum protein grams and it doesn't have to
be that more protein grams over the minimum are bad.

In western culture most folks get well over the minimum needed
protein.  The book "Protein Power" by Drs Eades (it has since
become a series of books not just one) has a chapter on finding
a person's minimum grams.  Mine is 77 yet I generally eat more
like 100 grams because I don't avoid protein.  At 50 grams you're
probably near the minimum you can have for long term health so
you'll need to pay some attention to your mixture of amino acids
in your protein intake.  My going over makes that bit easier - I
overshoot so the mixture doesn't matter.

Each type of nutrient has a healthy minimum.  For carbs look at
several popular low carb books and it turns out by maintenance
probably 100 grams per day as an average but the Atkins system
has a process to determine your own best level individually.
Protein Power teaches how to determine your protein minimum.
Mild low fat plans give levels to not go below in grams.

If you add all these minimum grams together, you'll usually end
up with a total caloric intake that's too low to be sustainable,
though.  Chris B is an example of long term sustainability - She
doesn't do stuff that isn't sustainable for her.  If you're disagreeing
with her on how to sole a problem you're doing fine.  If you're
disagreeing with her on which problems to solve you need to take
a step back and think it through again.

The problem is that picking the minimums of each nutrient type
gives too low a total calorie count, so one or more needs to be
over the minimum.  Chris is solving the problem with extra
protein because calorie for calorie it prevents hunger from coming
back for longer than carbs.  I solve the problem with extra fat for
the same reason because I'm a low carber.  Have you been
solving the same problem with excess carbs instead of either
protein or fat?  It's different without being problematic.

I have a 7 grain variety (Arrowhead brand) that takes forever to cook, but I
sure do like it.  COoked with skim milk, splenda and cinnamon it's great and
very filling.