Because I don't. But I know lots of people who do, and who are suggesting that if dd doesn't go to an academic, selective school next year she won't get into a "good" secondary school, presumably therefore ruining her chances of getting a place at Oxbridge and therefore ensuring she'll never get a job at Goldman Sachs (hmm...a blessing in disguise maybe). We're happy with the choices we've made in terms of education, and I know my parents never gave these things a second thought, and I did ok. When did it get so stupidly competitive?