Am I missing your point or is there more nuance to your particular situation?
They tend to apply dynamic subsets of this power tool to "projects", kept in "project folders", containing images downloaded with one tool, edited with another, graphics generated in a third, code edited in another, marketing docs written in yet another, data fetched by a script to be opened by a spreadsheet app, turned into a chart and combined with the marketing doc into a PDF-based presentation....
And Apple builds some hardware that would be great for adding powers to the metatool (quick, finger-drawn sketches turn into useful charts to be merged into some other doc with layout manipulated by hand...) but Apple's position is that their target customers are really far too...limited to be able to understand hard stuff like "folders" or how to even find their files after plugging a thumb drive into a USB port, so no folders, no USB, no confusing "orchestra", just sit back, poke an app button and buy something from one of our nice stores (you understand shopping, don't you? Poke the button), notice how thin it is, poke an app button and watch a nice video, notice what a nice shade of pink, uh, "rose gold" it is, poke an app button and distract yourself with FaceBook, express and opinion about a celebrity and, since we're always adding new ways to buy things, maybe treat yourself and buy something extra....
It has worked wonders for them financially, so I can't fault their logic (bemoan it, yes, but not fault it), but this is no equivalent of a power user OS with a real file system.
If you need to do some heavy work, do it on a laptop. You can buy tons of different laptops now that are very thin and don't take up much more room in your backpack than a tablet would. If you need any more power, then rent a compile server. There is always going to be a cost for having a portable device, it's that you won't be able to get all of your work done on it.
The real issue is when OS developers try to push this simple, tablet environment to devices that shouldn't need it.
Personally, I have two touch-enabled laptops and the only time I interact with the touch screen is when I try to point at something in conversation and am unpleasantly surprised when it moves the cursor.
The idea of sand boxing is a good one, but there needs to be an option for those of us who know what they are doing, or are willing to take a risk. I shouldn't have to rely on cloud availability constantly.
I don't understand what you're trying to say. There's no failure of the device here that requires a third party app.
Sure, if you want to exchange with another device - but not an app.