People can boycott the company. People can organize protests. People can use other healthcare companies. People can lobby to setup other types of healthcare systems.
Murdering someone because you don't like them isn't the answer.
Yes, I cannot believe how many people would like to see those they don't like just gunned down in cold blood. What is next? You don't like the homeless person on the corner so you just shoot them in the head?
There's a lot of people in this world who make bad choices like using drugs, alcohol, smoking, eating food that's bad for them, etc. Someone doesn't have to be poor to make those decisions. But those who don't have a lot of money, choosing alcohol over food -- then complain about not having enough food -- that's on them.
They don't deserve to be gunned down in cold blood and neither does someone with money.
If the point was murdering the innocent CEO was wrong, then yes.