I can understand his cynicism. Unless we verify scientific research ourselves, how can we ever absolutely know to what extent it is purely objective, and how much of it arises from the fact that scientists have to eat and to eat the have to make money.
Yes - the oil companies may be on board with the climate change consensus to make money, but making money is what our current system idolises. It makes it very diffiicult to judge whether someone is being objective, given the temptation.
If man made climate change is really happening, and if it is catastrophic, and it is not too late to do something, then, logically, we have no choice but to act if we want to save humanity and the consquences of inaction are dire.
The consequences of action are not dire, At best we will be wasting time/effort in a misguided attempt save ourselves for something that it is not in fact a threat.
In a simple truth table it looks like this:
Four possibilities. We cannot change whether man made climate change is true or false. We can only change whether we act on it or not. If we act on it, we save ourseles from it. If we don't, we gamble on whther it is true or not.