That's like saying you shouldn't worry about reducing your personal wasting of food because it doesn't solve world hunger—like when choosing not to fly often there's a small impact that is very much noticeable on a larger scale if more people did it.

Even if the industries, the western world, developing countries forced to use coal plants for cheap energy (and you can choose many more actors that play a larger part in causing the climate crisis) contribute to the problem more than you as an individual, at least you're not actively making the world a worse place.