Mostly agree, that we must start over. But to do that, we must first have a moral theological method, and natural law as "induction" from facts of nature rather that "deduction" from presumed first principles strikes me as a good starting point.

To assume from Aristotelian metaphysics of teleology, (1) that the objective of intercourse is procreation is a suitable moral premise from which to "deduce" that coitus without openness to children is immoral is not grounded in factual data; whereas (2) to observe that we experience sexual desire as homosexual or heterosexual or somewhere in between, and from this body of data, "induce" the both homo- and hetero- coitus is natural strikes me as reasonable moral reflection, grounded in data.

Also, as I read around prior moral theology manuals, I see precious "theology"--its all Thomistic philosophy. Actually seeking moral guidance from scripture as to haw Jesus reasoned morally seems to be entirely missing.