That is the language of science. You'll find that language in EVERY single science paper. And the reason is that science doesn't deal in absolute certainty.
Look up a paper on germ theory. It will have the same language: "data suggests germs cause dease".
It doesn't say "germs cause desease" as being an absolute trueism.
If this is your "objection" to these papers, then I got news for you: this logic "works" against ALL OF SCIENCE.
Because the authors are honest with some intellectual integrity.
Meanwhile, the point I made still stands and remains unaddressed: yes, there very much is a scientific consensus that sexual orientation of individuals is NOT a matter of choice and rather something deterministic from other factors, very likely related to their biological makeup.