I disagree. They're both essential and individuals doing nothing and insisting that political/government intervention is the only solution isn't going to get anywhere.

Corporations and governments will take notice when individuals change behavior, if you stop buying products that contain lots of single use plastics, companies will stop making them. If you divest our pension and savings from any company with an interest in fossil fuels, they will notice and change. If you half your meat consumption and eliminate beef, it will be noticed and a change will happen.

There is massive power in consumer action, particularly for those of us in countries that are really the problem (the rich ones).