I don't know anything about evolution or genetics, and I'm pretty sure this guy doesn't either. Why would everyone become disabled because more disabled people survive and pass on their genes to their kids? We don't stone gingers to death and yet we are not all having red-headed kids.
The repeated use of the word "weak" (as opposed to "sick" or "disabled") seems revealing.
Questions To Which the Answer is No, an ongoing series:
No, not software engineers, engineer engineers. Yikes!