Voice input will always be inherently worse than mouse and screen plus keyboard, because voice is linear.

It can only ever be a linear sequence of input

The 2 dimensional field of a screen and a mouse and keyboard give you extreme amounts of input and allow you to contextualize that input in arbitrary ways that intuitively make sense to people with minimal training. Most people do not need to be taught that "Paste" goes to the active window.

We barely even touch the surface of what is possible through this set of input devices and output and yet we can't even get that level of fine grained and reliable control into touch screen devices and gamepads, let alone a linear stream of pitch.

Voice cannot be a robust interface. It isn't between humans. There's immense nonverbal communication and human communication also relies very heavily on preshared context to actually get that info across in the first place. Even with all that machinery, human voice is generally considered to only carry, regardless of language, 44ish bits per second of data.