It's not nearly as popular because recent history has shown there are assholes like Vladimir Putin for whom "wanting to help other humans" is only showing weakness and a reason for him to try to overthrow you or conquer you.

How anyone can promote pacifism as a credible foreign policy in 2023 boggles my mind. Ironically, the best quote is Trotsky: it doesn't matter whether or not you're interested in war, but whether or not war is interested in you.

Si vis pacem, para bellum.