For iOS there’s absolutely an argument that it’s not capable enough, but as a regular user of all three major desktop OSes I find such complaints about macOS overblown. While there’s small kernels of truth here and there much of it comes down to macOS being built around a different set of conventions than the desktop environment they’re most accustomed to (usually Windows) than inherent incapability. This is further evidenced by how it’s common for longtime Mac users have similar complaints about the Windows desktop being inadequate/incapable.

Desktop environments and user workflows are insanely personal things, not unlike clothing, diet, and music preferences but for some reason many in the tech sphere refuse to acknowledge this and try to position their preferred environment as objectively more correct/superior/etc. It’s really tiring.