Right, I think that your interpretation here is basically correct. There's a lot of different words and ideas we can use to represent approaches to problem solving, and they're going to overlap a lot. And I think the exercise of treating them like they're mutually exclusive and "correcting" our choice of language by saying one term is more correct than another, more often than not, is just kind of tedious and beside the point. It's a good general rule of thumb for understanding any of these articles, and affording them what the philosopher Daniel Dennett referred to as the principle of charity.

It's not to say that such corrections are never appropriate but that the principle of charity step should be completed before going into the exercise of attempting to correct language.

Rejecting these kinds of ideas - business adjacencies - is especially difficult. I've worked at a number of places and every single one did this exact thing - lost focus on sensible sounding adjacencies.