Teaching something to kids at a young age certainly does not make the whole industry gender neutral, but it allows girls and boys to learn something together, lessening the bias that they will learn when older and logically able to understand the gender inequality in any specific industry (and hopefully by the time they are actually that old, the ratio will have lessened). And yes, other industries might be facing the same issues, but the numbers are certainly not as depressing as the ones in CS and CS related fields.