Earlier quoted context omitted.
> It's a bit silly every application would follow the same guidelines as applications are intended to do different things. Platform UX/UI conventions place too strict limitations on innovation. They really don’t. Have you taken a look at the thriving ecosystem of native, powerful macOS apps that follow platform conventions?
Most apps that I know people use in MacOS are really not native-controls based - Ableton Live, Max/MSP, VDMX, Resolume, Mathematica, JetBrains IDEs, VSCode, Sublime Text...
I also think "professional" apps are a special case (which is a totally subjective classification). Even Apple and Microsoft have done their own thing for professional apps since forever. If I'm going to use that app for 8hrs every day, I'm more accepting of learning something new. I'm still more likely going to pick up an app if it follows existing conventions...I already chose my OS because I've learned and like those conventions.