That too.
But [I'm in the richest 2% globally](https://howrichami.givingwhatwecan.org/how-rich-am-i), know quite many people who are probably in the 1%, and none of them use private jets. The impact of that is at the very end of the tail of the distribution, perhaps a fraction of a fraction of the 1%.
I would absolutely tell a rich person to avoid flying private. But it's way more cost-effective to have hundreds of millions of people switch to plant-based diets.
Both initiatives can (should) coexist.