Safari has long been better for battery than Chrome but people still install Chrome on their MacBooks.

Yep. Chrome's mindshare and momentum is incredibly difficult to overcome, and outside of technology-oriented circles users generally don't develop associations between specific programs and poor battery life unless it gets the fans blaring like you're running Cyberpunk 2077 with setting cranked to max or something.

It's similar to how the overwhelming majority of people driving cars aren't going to make note of the difference in driving dynamics between CVT and automatic transmissions unless one severely underperforms compared to the other. It either runs or it doesn't and that's where the distinction ends for people who treat their car/computer/phone as an appliance.