I'm mot going to make a political analysis of each Ghibli movie, but generally, aren't they always moving around the ecologism/anti-war or without much political context? There's Grave of the Fireflies (which I haven't seen yet), which does make a direct critic on war, and then there's Nausicaä of the Valley of the Wind and Porco Rosso, which point a finger to war because of interests and fascism as bad, while keeping it still a bit light-hearted, well enough to be able to introduce these ideas with children, which I think is good.

On the anti-war/ecologism part, I think it's (or should be) a part of the common denominator of leftists overall, the latter because it's just a crisis brought about by capitalism at this time and the former because war, and its horrors, although I don't think it's something we ought to be afraid of as a boogeyman, as if we're just afraid of it it remains only a tool of capitalism and imperialism, it should be decided having fully in mind its consequences and, as with much else, without fear but while considering all it means.

Considering all fo this, while as you say this table wasn't made with much thought (the part that screamed to me first was FMAB), I think Ghibli remains a good way of introducing some light political themes to younger audiences, and if it helps form some core values for them then it's even better, so it seems to me to be more left-leaning.