> In the past when I see people using Ubuntu, I always wondered why?
Because I don't have a wired internet connection, and my wifi adapter requires proprietary drivers. If I could just download and install from an ISO like I can with Ubuntu, I'd switch to Debian in a heartbeat, but I don't feel like having to do manual workarounds just to get a running Linux distro.
But not any sort of actual one--do you imagine that "unofficial" has a technical meaning of greater significance than that Debian people don't care for proprietary binary blobs?
The Debian site makes hard to find the operating system images containing binary firmware for various devices, but they're all there. Another poster published the right link, however should you some day not have it handy, a search for "debian firmware image" will lead you to it both on DuckDuckGo and Google.
Installing Debian 11 on a seven year old laptop to test something involved Debian helpfully mentioning it was missing network drivers and couldn't continue (okay), which effectively meant searching the internet for the files mentioned on another computer (dubious). Because this laptop was being used exclusively to test something on Debian 11 (openssh-server with U2F support) I just settled for some random GitHub repo with the driver binary (the only place I could find it). Not a great user experience.
The Ubuntu way is to suggest installing non-free drivers from the same reputable source as the rest of the distro: by clicking your assent right there in the installer.
Because I don't have a wired internet connection, and my wifi adapter requires proprietary drivers. If I could just download and install from an ISO like I can with Ubuntu, I'd switch to Debian in a heartbeat, but I don't feel like having to do manual workarounds just to get a running Linux distro.