There’s always a supplier and a consumer. The pollution of these 100 corporations is caused on behalf of their customers who fund them in exchange for fossil fuels, directly or indirectly. They are both responsible, it’s 2 sides of the same coin.
Of course, much of this pollution isn’t really avoidable at this point. We can’t have 100% renewable power and electric cars tomorrow. Some really polluting industries will take decades to decarbonize, like steel and cement production. But this makes it even more urgent to adress the low hanging fruit asap, i.e. big sources of pollution that can easily be cut. Private jets are a prime example.
You could say just a few private jet flights or chopping down one single forest won’t make a dent in global carbon emissions, but that doesn’t mean that thousands around the world can keep on doing it indefinitely without consequences for all of us. Especially if they are idols for millions of people, normalizing harm to society that we can’t afford.