Back when climate change was the issue of the day, there was a response I heard. Paraphrased, it's "I won't take climate change seriously until the people who tell me to take climate change seriously take climate change seriously."

For example, instead of climate conferences being virtual, they're held in person and attended by multiple leaders that fly in on private jets.

https://theconversation.com/why-are-people-still-flying-to-c...

People are sensitive to classism during a purported crisis, and so things like that tend to ruin messaging.