You're right that the system is set up in such a way, that it often prevents meaningful changes on the individual level. However, the individuals are still consumers of those businesses, and our habits are driving their profits and further destruction.

The change has to come on both levels.

Let's not use it as an excuse to do nothing.

https://www.theguardian.com/environment/2018/may/31/avoiding...

Avoiding meat and dairy is ‘single biggest way’ to reduce your impact on Earth