But part of the problem is that for almost every demographic air travel is not only a big part of each person's total emission budget, it's increasing over time. You're probably flying more than your parents did, and your children have probably flown more now than you had at their age. The aviation industry took a big hit die to the pandemic, but it's been growing steadily up to then[0], and is soon back to pre Covid numbers. People are used to flying several times each year now, while it was considered a luxury to do one flight per year a couple decades ago, and something you did maybe a handful of times in your life a few decades before that. And like most consumption, it's also vastly skewed towards the rich, whether it's the richest in your country or the richest countries in the world.

Personally I don't think global travel does much if anything for peace. Most wars are between neighboring countries and are started by leaders that have other reasons than not having visited the other country for doing so. Although travel isn't the issue, fossil fuel is, so instead of framing it as travel is good or bad, it should be about where the energy is coming from. And just like with economy, if you have a certain (carbon) budget, you can't spend more if you already spent all of it.

[0] https://www.icao.int/Newsroom/Pages/2021-global-air-passenge...