[buildfocus]

> you get basically identical popups for a website wanting to send you notification

Last I saw, that's not really true - you get asked for BT access in general, but then you have to directly select the device you want the site to connect to once scanning happens (site can specify basic filters to limit devices shown, but little else). Sites can't see what devices are available until you actively select the device from the browser UI, and can't just show you a 'click to give full access to BT with everything'.