They do, and they often do collect accurate data. Philip Morris, for example, knew about the danger of smoking for decades, and Exxon knew all about the greenhouse effect. They didn’t publish that data, of course, and publicly argued to the contrary.

Depends if the accuracy is counter to profit. Not to say governments don’t have their own biased incentives, but they tend to be of a different kind.

Private companies care way more about making money.