Plenty of computer science students at my (SICP-using) university had never programmed before attending, yet they're great at it. Your attitude is especially damaging to female students, who are even less likely to lack programming experience. Computer science isn't even about programming all that much.
> You can't study Economics if you've never heard of Keynes.
> You can't study Economics if you've never heard of Keynes.
Have you ever even been to a university?