That's similar to advice I received from a raptor conservationist. More native foliage in suburbia means more bees and bugs, more bugs means more birds. They suggested a water bath and some native plants in your yard can go a long way to supporting the native wildlife the you may not even realize is in your area, until they have reason to stop by.
Small conservation efforts really do make a difference. Don't be discouraged that you're not fixing the big issues. Pollinator gardens will improve biodiversity in your own little corner of the world, and that's worthwhile in and of itself.