The way I look at it, people come into technical security either from operations or development backgrounds, but it's hard to distinguish someone who has the required skills from their years in dev or ops from those who have managed to do their core work so without going into the relevant details; their CVs are going to look pretty much the same.

A hobbyist might have practiced on some CTFs or vulnerable machine challenges, but unless they haven't e.g. won some bug bounties or gotten some CVE disclosures, then that won't be really visible on a job application. If certifications aren't considered relevant by security hiring managers, what is?