Those with "moderation" privileges have them because they have demonstrated contributions to the site that have contributed to the success of Stack Overflow in some meaningful way. Many people have reviewed their contributions and have deemed them worthy of note. They have demonstrated a long-term committment to SO, and they've shown that they understand how the system works.
Thus, they have powers that other SO members lack.
While we appreciate the work that is done in low visibility tags, because they are low visibility, they are not a contribution to the success of the site. Their contributions have not been vetted by as many people. Their committment to the site is not as well established. They may have great knowledge, but there simply isn't much interest in that knowledge, so we cannot verify it in any reasonable way.
The most effective way to deal with this is the most obvious: help keep those tags from being low visibility. Encourage Lua/whatever developers to come out of their forums to ask and answer questions here. Give the tag higher visibility, and people will get the rep they deserve.
Another effective way is to simply post better answers. I've looked over some of your answers, and while they're satisfactory, they're not particularly great. I've never had much trouble getting up-votes in Lua, for example. I'd say that of the main tags I frequent, I probably have more 0 and 1 voted posts percentage-wise in Lua than anywhere else, but that hasn't stopped me from having fully 1/3rd or so of my posts be +3 or better.
Remember that in low-visibility tags, quality matters more than ever. Speed isn't nearly as important. Each view is precious; you want each person who sees it to go "wow, that was really good!"