I harbor similar sentiments, but I understand why OpenAI, Anthropic, Zed, etc begin with a macOS version. They're able to target a platform which is a known quantity and a good jumping off point to Linux.

I'm writing software for Linux myself and I know that you run into weird edge case windowing / graphical bugs based on environment. People are reasonably running either x11 or wayland (ecosystem is still in flux in transition) against environments like Gnome, KDE, Sway, Niri, xfce, Cinnamon, labwc, hyprland, mate, budgie, lxqt, cosmic... not to mention the different packaging ecosystem.

I don't blame companies, it seems more sane to begin with a limited scope of macOS.