"There is nothing wrong with giving a child the comfort that he craves in the manner that he craves it."
I disagree with that. As their parents, we gently guide them towards different comforts as they grow - ones that encourage their emotional development and don't cause them physical harm.
We take away the dummy before a child's palate and upper jaw are deformed. We potty train and take away the nappy although a child might find it comforting to have it on. We do all these things because we see beyond the comfort of the moment and think of the long term benefits.
A 3 yr old who wakes up in the night with a nightmare can be comforted with talk, hugs, and kisses. If his mom has put a boob in his mouth whenever he cried in the night prior to that point, maybe he won't have developed these alternate coping mechanisms. That is not a good thing.
"I sucked my thumb until adulthood so did my brother, we are both normal, well adjusted human beings who have suffered no trauma from our protracted thumb sucking"
I didn't see anyone say thumb sucking would cause psychological trauma.
What about your mouth, though? What sort of an overbite do you have? Front teeth sticking out much?
I know only two children who suck their thumbs regularly, and at 3 and 5, their upper jaws are already deformed in that trademark way