You're right, I might have overstated my exasperation a little for the sake of argument, but as someone who's used an Android tablet for nearly two years, and has owned an iPad for less than a month, the lack of centralized file management does leave me looking for work-arounds at times. For instance, not all apps work nicely with the stock email app (or my personally preferred email app, "CloudMagic") to allow for attachments. It's annoying that it's an app-by-app issue. The same goes for downloads. I wish there was just a centralized download folder which I can have on the home screen, and files or media I download from the web, or email attachments, could just go there and then I could decide what to do with them.
Let me again emphasize that I'm new to iPad ownership. I've been using iPhones for years, but my usage and expectations for a tablet are different than for a phone. So I'm day by day becoming more accustomed to the iOS way of doing things, but I don't think that it will ever feel as natural and unrestricted as what I'm used to with Android and Windows, and I do appreciate that it comes with its own advantages such as better security, smoother operation, and less bugs (in theory). I also perhaps make things a bit more difficult for myself because I refuse to go all in with the Apple ecosystem, and I still use an Windows PC, so while Airdrop between my phone and iPad are an option, not so with my laptop. Do you think it's possible that Apple could one day release a Windows Airdrop app? That would actually help a lot.
Regarding the thumb drive, I own and carry a number of them, but they don't help when it comes to transferring content between my iPad and PC. As I mentioned, needing to depend on iTunes or a cloud service to get a movie from my PC on to my tablet is less than ideal.