Because he knew of, and had agreed to, the restrictive covenants placed upon him and yet joined easyJet anyway, prior to this judgment. Either he misled easyJet about the covenants in place or easyJet didn't care. It's not true that such clauses are unenforceable and at that time it had not been ruled, as in this case, that the restrictions went too far, a decision made by the judge with "considerable reluctance".
You've only got to look at his plagiarised 'from the heart motivational speech' to sum up this guy's character. A total phoney.