If you are going to use a desktop instead, you are hurting your security significantly. Traditional desktop OSes like Window, MacOS and Linux desktop lack a sane security model with a mandatory app sandbox with fine-grained permissions. They also heavily use memory-unsafe code compared to modern OSes like Android OSes and iOS and lack modern exploit mitigations. Only daily drivable productions grade desktop OS with security in its foundations is ChromeOS.

I never said anything about desktops? You don’t have to use those either, though.