alt Hacker News> You could own a microwave, but there doesn't have to be a button that makes it run with the door open. The UI of devices doesn't let just anything happen.
And where is the UI capability that prevents microwave users from putting liquids (e.g. grape juice) that generate plasma storms inside the microwave and often result in fires? Or, as a bonus, crinkled foil.
To state the matter bluntly – the entire diatribe concerning the system’s role in defining capabilities is as constructive as insisting that every computing device and appliance on the planet must implement B2-level RBAC and capability-based controls – an argument so unmoored from practical reality that one wonders whether its proponent has ever been burdened by implementation.
The UI is missing because the law doesn't require it. That's why it's possible to by tablesaws without a SawStop like safety mechanism despite it being superior to have (ignoring price). Some people will choose the cheaper and less safe option because they don't value safety as much.