>Unpopular opinion around these parts, but there's a high correlation between the best candidates and people who take the time to review the job posting and customize their resume before submitting.

There's also a high correlation between matching the job description perfectly and the resume being AI generated and/or dishonest. Doubly so if the requirements are overly specific or contain pure nonsense as some do (saw "Must have 5 years experience with Claude Code" recently). You can filter out people who blatantly don't match the job and those who obviously just copied the job description. Never seen much correlation between the quality of resumes in the middle (ok to great) and how well they do in interviews.

Not to mention at many places "requirements" are mere suggestions or a low-effort list of technologies taken from the resume of the person who quit. Everybody has their own filtering rules and hiring managers rarely agree with each other much less the HR people usually doing the first round of filtering. The true requirements come out only at the resume filtering or interview stage.

>I doubt the "best candidate" is also the person who can't be bothered to take 10 minutes to update their resume before pressing submit.

The "best candidate" a lot of times doesn't mean the best able to do the job. It often means the ones who 1. makes the hiring manager feel good by being enthusiastic about their (statistically) average job for average pay and 2. minimizes their perceived risk of looking bad for their hiring choice.

>If a job listing asks for Python and someone submits a resume that does not list Python, it's fair to reject that candidate.

If you're not a FAANGMULA type place then sure. But also if your job posting lists something like "Python 3.14" or "7+ years Python" I know the hiring manager probably doesn't know the first thing about python. In that case I think it's fair for any decent programmer to lie because they will likely surpass the hiring managers knowledge by studying python a bit before the interview.