Every content in this game can be cleared by all jobs.

If the static purpose is to clear content, they should look at the players' skill rather than which job they are playing.
If the static purpose is to get high numbers (FFLogs/Speed Kills) then they should consider both the player skill and their job.

In most cases, FFLogs/Speed Kills happen around 2 months after content is released. That is when everyone in the static have their BiS.
So if you are looking to clear content on the first weeks/month of their release, focus on getting good players that can carry their weight and more at minimum item level, not which job they are playing.