A lot of candidates are complete morons, regardless of experience or education. We hire the people who show competence in the interview... a lot of people simple have zero.
and in helping some friends/people over the years get job... usually the biggest issue is how they don't actually properly apply or sell themselves. They blast out some generic shitty resume/cover letter for every job and just expect it will get them hired, instead of tactfully marketing themselves to the employer.