That is true, but it doesn't mean they should be given a job they don't have the skills for. Or would you like to have "Affirmative Action" doctors?
I don't for a minute believe it is necessary to have been coding since you were 12 in order to do most jobs in Silicon Valley. But if companies decide to discount people because of it, then you will absolutely filter out people who come from lower economic backgrounds.
This is a great example of institutional racism.