Why do we care? If Starlink/Twitter/X doesn’t want to do business in BR or comply with local laws, then they are bound to suffer consequences (losing audience or assets seized).
Because it's fundamentally unreasonable to hold one company responsible for the actions of another on the basis of a common shareholder and executive? The rule of law (or at least the generally consistent appearance of it) is far preferable to the open rule of man in wantonly levelling attacks against everyone and everything associated with someone that a government official dislikes.
https://en.m.wikipedia.org/wiki/Malfeasance_in_office
Basically a wilful misconduct.
However the balance of powers in Brazil are different from common law, or are corrupted, so we see what comes out of this.