Do you mean this seriously? Corporations come and go all the time, and if they make a catastrophic decision, usually the worst possible outcome is bankruptcy, not war.
Yes, there is a tiny amount of "too big to fail" corporations whose characteristics are closer to a state than to a private organization, but compared to the government, any single corporation has negligible influence on your life.
Modern governments have enormous powers.
Like, obviously I'd be in a big trouble if my password manager suddenly put all of my data online and it could lead to massive financial damage.
At the same time, there are governments that literally have the power to kill their citizens (or citizens of nearby countries). At least LastPass can't declare a war upon me.
True, but an individual is vulnerable almost by definition. A schizophrenic neighbor may decide that you are an alien in human skin and kill you. (I have a friend who barely survived precisely such encounter, being shot no less than 9 times from a CZ75. I have seen the (healed) entry wounds, that guy was extremely lucky.)
Nevertheless it takes a government to ruin lives of an entire nation.