What's the big deal? You quote a fine example of Darwin attempting to disarm his would be detractors and get a fair hearing: "Of course, Old Chap, all sorts of objections will occur to you, and I may be grand fool, I've considered that myself many a time, but I've thought long and carefully about this. I don't ask you put your reservations aside, but do hear me out, won't you?"
Sorry, but why should we join you in obsessing about Darwin's rhetorical devices? Interesting as that may be, isn't the substance of his theory, and modern versions thereof, more important?
If it is presented as it actually is, that is, as theory and not fact.
It is taught by many, that his theory on Origin of the Species is fact, when his book of the same name does not even pretend to show how species originated.
I understand a lot about the theory of electronics as I worked in the field for 40 years, but it is still taught as theory. Nobody claims to know for fact how it all works.
That doesn't stop anyone from using the theorys to make things work. We just don't make it like religeous dogma the way evolution theorists do.