I look at my own resume and the skills I am willing to list on it, and it looks light compared to the resumes of the people that end up managing people like me. However I am leagues ahead in terms of actual skills compared to them. I list a skill if an only if I am truly competent and if I am only somewhat familiar, I will qualify the skill.
The people that end up managing people like me, list far more skills, but have far less skills. They get away with this because the job they want is one that doesn't require applying the skills they list.
I'm on the fence about certifications, since they do tend to weed out some of the people above. However for people that do intend to acquire the skills to do a job and apply them ( as labor ) the certifcation process doesn't help toward that much.
Certification seems to be akin to buying a commission in ye-olde royal navy. It the annoyance weeds out some riff-raff.