I used it as a scripting backend for a long time, but eventually you will realize that you are not the only one that could write scripts, but you also really need to have a trust boundary (or just a different address space), so that errors in the script don't drag the whole thing down.
That's where Lua and LuaJIT shines: It's simple, and it's sandboxed. However, there is still one thing missing. These days, several programming languages have several targets that they can compile to, and so imagine if you could emulate some platform at high performance with low overhead, in a sandbox. You would then be able to script in whatever language you so desire, provided it has that target.
Unfortunately, those languages tend to be system languages and not the absolute best for scripting. With one big exception: Compile-time programming support.
I think it's fine and fun as anything else to make memes about star signs or whatever but some people take it seriously to the point of making sweeping generalizations about people based on what the alignments of planets when they were born.
What is the connection here? What does that have to do with linking relationship dynamics to astrology?