Phew! I greatly appreciate the information you provided; that cleared up a lot for me! I wish I had known this when I began trying out some Lua code of my own at Swedish WP two years ago. Anyway, I didn't get very far with that, which is just as well, as I can now readjust my efforts in case I find time to continue that work.
By the way, you mentioned reverse (inverse) properties, something I'd like to avoid. What are the chances that Wikipedia infoboxes and other widgets will some day be able to look up things like ?sense wdt:P5137 wd:Q482980 or similar themselves rather than depend on Wikidata editors to specify female form of label (P2521) in a few hundred languages for each profession mentioned in a WP article? If there is an ongoing transition process, what can we do to help speed it up? We have an entire section of Wikidata devoted to lexemes, but Wikipedia seems to require those to be duplicated in Q-item space for lack of an inverse lookup function, which I consider an utterly wasted effort hindering Wikidata development.
I have updated my personal page User:SM5POR#Current work to illustrate what kind of agenda I follow for my involvement with Wikidata.