As someone who started using desktop Linux and supported it professionally before the turn of the century, yes, I’m aware and you’ll note that I never claimed otherwise. The reason I mentioned general purpose operating systems is that they’re not optimized for non-keyboard/mouse UI and you’re more likely to get in a situation which requires more work to sort out via the CLI.
The other concern I raised was drivers. Support for hardware video decoding, colorspaces & depth, high-quality sound, etc. is certainly technically possible but also something which not-uncommonly ends with angry rants. If you are passionate about open source and eager to take on that responsibility, great, but it’s not a popular choice.