User consent. Uninformed consent is not consent.

You cannot meaningfully consent to running software on your devices, or running your life on software, when that software's source is unavailable.

Why does that require there to be 'less open source'? Nothing is stopping that already today. Impact wise, everyday people can't use build tooling so this kind of thing only effects people that are 1 keystroke away from modifying the code and not being allowed to share it.