Not sure it could be characterised as irrelevant as to the competence and efficacy of the charging authority, which has to potentially bear some relevance to the weight and likelihood of success of the charges.
If the charging authority can’t get the pleadings right, how can they be expected to have the wherewithal to get the charges home?
If you read some PoCs that were manifestly wrong would you, ceteris paribus, view it as irrelevant to the prospects of success in the claim?
If someone can’t get the basics right and then it’s usually a sign of wider failings.