So, the argument is ... either cede control of your browser to us in a form where it is illegal to examine what we do with it OR we will continue to use a piece

So, the argument is ... either cede control of your browser to us in a form where it is illegal to examine what we do with it OR we will continue to use a piece of crappy technology that exposes you to security problems. That sounds less like a technical problem and more like a threat to me. Because neither of those are actually technically necessary, except to support a business model that depends on some form of DRM.