Puzzled: why is the conversion to SQL either interesting (SQL being a logic language so if disregarding recursion[1] they should map straightforwardly[2]) or of business value?

[1] yeah, CTEs, I know

[2] yeah, words are cheap from my end, I know

Edit: additionally, and for curiosity: the article covers use of datalog but no underlying security model (eg. consistency of access to resources so you don't have one way blocked to you but can go around via another route, as I know of one homebrew system where you could do that). How do you deal with that? I understand lattices can be used for this (TBH I have only done a little reading on these).