Vulcan wasn't a primitive race. It was a warp-capable interstellar race which had a reputation of technology in local space. It was a member of United Federation of Planets, too.
But, when Narada went to Vulcan (planet), we saw this:
- No Vulcan battle cruiser tried to engage Narada (which wasn't cloaked at that time).
- Narada was trying to destroy Vulcan and nobody on surface knew about it. Even Enterprise alerted them.
Can you explain it?