As I get older I'm more in favor of this kind of thing. Freedom of speech ought (here I go; a terrible Kantian asserting an, "ought") to apply to political speech. Using FoS as a defense against aimlessly attacking others seems to undermine what is a basic expectation of civility (ie. not being made to feel unsafe) in advanced societies. I feel like there's a class of people that would gladly slaughter cows in front…
Basically, Masayoshi Son won't ever go to jail (he's too important to go to jail), but someone trying to expose his financial crimes will.