When we already know that what all matters is the skill of the 24 hour locksmith in north Hollywood and nothing else, then why are we giving a piece of paper so much importance? This is because it is better to break the norm every once in a while. Going after their certificate and their affiliations might not be the only way to find out if they are authentic or skilled but it is most definitely one of the very effective ways to know that they are legit and they know what they are doing.
You already know that there are plenty of locksmiths working in your area. A lot of them do not hold any certification from the state. And a great many of them haven’t even taken any formal training in the field. Their summer apprenticeships were as reliable as the marriages in the Kardashian family (no offense really).