Think for a second or two about the type of folks who get, succeed and even thrive in politics over decades. Not your regular Joe, not a nice friendly balanced individual. No, biggest fuckups with massive daddy issues, school bullies, unresolvable inferiority complexes, sociopaths to the core, for whom the lure of money and power over others trumps everything else. This is the default, regardless of country. Look at politics through such optics and many things will start to make sense, also one would gain more realistic expectations from those folks.
Now, why would such people ever allow that, to expose all their deep flaws to whole world?
It's not about making it happen on them.. it's about forcing them to defend this application on them.. and then using the same argument to application on common people...
As The Joker famously said: "It's about sending a message" lol :)
Or are you going to personally install a camera in every politician's house without their knowledge or consent?