The real answer is that the people who are in control of these companies, the people who generally succeed in business enough to take control of these businesses, are not the kind of people who understand, believe in, or care about climate change. On the whole, they are more selfish, deluded, and short-sighted than the average person because those are the kind of people that are good at making a quick buck for the shareholders, getting a big bonus, and then bailing out when when things get hard. They're also the kind of people who will virtue signal their intent to do something popular to see if it helps their bottom line and then quietly back off when it doesn't.