Having the required qualifications is the bare minimum - the 1% that lands you the interview. But everything after that - the remaining 99% is just pure luck.
Bosses/HR Managers often make the decision based on sympathy, or familiarity or just a hunch.
This guy reminds me of an old friend that died years ago - Hired
This gal went to the same university as me just 10 years later than me - Hired
Oh he is also Interested into Warhammer 40K - Hired
This women has all the qualitifactions - but she dared to wear something I didnt like - rejected
This guy has all the qualifications - but I just didnt like his face - rejected
This applicant has all the qualifications - but he said that one of his hobbies was fishing. Boss hates fishing and thinks its stupid. Rejected.
Managers/HR managers often make decisions not based on qualifications, but on sympathy or familiarity or feelings. The decision is often random, based on the preferences of the boss/HR manager.
You can fulfill the requirements 101% and have 2x more relevant work experience than every other candidate. But because you said that you dont like golf - while the boss loves golf - you get rejected and they hire the guy who checks only 80% of the requirments and has only half the work experience but who said that he loves golf.
Interviews are like a minefield where you dont know what to say and just one wrong sentence can ruin your otherwise great chances. One wrong sentence can trump all experience and qualifications you have.
I guarantee if there are 2 guys in the final round, and the guy who has less experience/qualifications stalked the interviewer and found out everything about their hobbies and preferences, and weaves it into the conversation, that he likes the same things / has the same preferences, he will get the job instead of the more qualified guy 9/10 times.
But since you dont know anything about HR/Interviewers/Bosses preferences ,tastes, past, getting the job is basically pure luck. Because the same thing you say to one Interviewer/Boss will secure you the job, while for someone else the same thing will mean an instant rejection.