The problem is far from invisible (to me at least). A few months ago on HN I used text editing as an example of how iOS wasn't ready for "business" use. I can't find the comment now, but my memory is that I listed several of the issues listed in this post and said something like "Text creation/editing is core to the 'business', non-content-consumer use case. Apple needs to either acknowledge these problems and work to solve them, or admit they cannot solve them and stop pushing this narrative." It's especially telling that the author references Apple's 3D Touch as being an enabling technology here, when Apple shipped it without thinking of a valid use case for it, and then discontinued it after several years of still not thinking of a valid use case for it.
It's interesting to me that Google had Tablet Tuesdays. One of the things I've said many times is that it's obvious when a company actually does the thing they're pressing users to do. Google obviously uses gmail, and just as clearly never used any of the social products they released. But I think Tablet Tuesdays doesn't accomplish the thing they hoped it would: if you can use a regular computer 4 days out of 5 -- or maybe 5 out of 6 :-( then you can limp along on that one day and not have enough incentive to actually solve the problems. "Tablet Tuesdays" should have been "Tablet Teams" -- whole groups of people forced to use nothing but a tablet, with no way to hide from the problems that caused.
Eloquent seems like an excellent existence proof that better is possible. Personally, I would try multi-touch gestures to solve some of the problems. It might be (okay, likely is) too complex a solution, but Apple (at least) can detect up to ten(?) separate touchpoints. That would be absurd, but I'd be curious to try copy/paste with multi-touch shortcuts. And it seems that selection might benefit from multi-touch as opposed to the (admittedly clever) pressure hack Eloquent is using.