Interesting topic. My mother teaching 40 children per class in very rough state Catholic schools after the war sought to teach them correct grammar - so no "for free" or rather than "free", prepositions correct etc etc Why would one want to change the grammar or even accent of pupils or our children? Simply because it can help them get jobs. It is not just exam results which matter when you're being assessed and indeed speaking to clients and customers. Obviously it depends on what you plan to do and for many jobs it matters not a jot.
We have had years of interesting debate with the children over words, grammar, accent, class. I remember the days of my under 5s saying "you was" because their nanny did but that changes once they get to school unless you send them to a school where the teachers say "you was".
Then was the teenage phase with that awful rising inflection at the end of sentences like a question but that seems to have died as death as did the even worse "like" every other word in sentences.
Now the 8 year olds who do loads of grammar at school and are quite good are learning MSN speak and take huge pleasure in laughing at my writing "you" when they know the rule is to write "u" if you're on-line (in their world, not mine - I cast men into oblivion if they type "u").
"Why do children feel they have to hide their intellect or else get picked on?" - on that topic they don't if you send them to the right school. One reason some of us who are able, pay.
Beauty... ah yes Labour can dumb down children into one size fits all comprehensiveness and let the brains of the child stultify but they can't take away beauty. We are all born with these natural advantages or disadvantages. I never realised when I was growing up as my mother was wise enough not to mention it, that they thought I was better looking than the others but my sister who only just told me, for her it was a big thing. Why did she think it mattered our bone structures differed? I suppose because all you musmnetters are more likely to buy a woman's magazine with a beautiful woman on the front cover rather than an ugly one. So we have this interesting situatino where most people won't admit they prefer beauty but their behaviour shows that they do. So in effect many people are liars on this issue.