Framework laptops solve this by having physical switches for the camera and microphone at the top of edge of the screen. Can’t get safer than that except for physical removal.

If you just want CAD without CAM then the free variant of OnShape is amazing.

deleted by creator

For me, it’s the feature discovery that’s massively lacking. Last week I wanted to scale the selected area. Had to search for it online. The UX is the least intuitive one of all drawing software I’ve used.