I’m not talking about my own empire, I’m talking about the AI, which is limited by what it can and can’t do to mitigate ethics attraction.
Also the number for xenophile ethics attraction are:
2.0x - Pop is not enslaved and a sapient free alien pop is on the world
2.0x - Pop is an alien, does not have full citizenship and is not enslaved
1.5x - Allows alien leaders
1.5x - Non-subject alien empire has migration access
1.5x - A
charismatic alien pop is on the world
1.33x - In a defensive pact, commercial pact or Federation with an alien empire
Now let’s remove the charismatic trait, and assume that if you’re allied with a nation, you’ll have a migration treaty and if you’re not authoritarian that allows slaves, (which isn’t every authoritarian empire) or xenophobe, that’s a natural 5.33x attraction to xenophile, simply by AI empires forming alliances.
The only other ethic to come close to this is Militarist, but a very specific set of circumstances need to be achieved to make it happen (allow military service and for a planet to be occupied) at 5x. Or xenophobe IF someone is genociding your empires (which is unlikely as most empires are xenophile by the time they can start doing this
What I’m saying is, it’s really very easy for AI’s to get that 5.33x attraction, whereas others need very specific circumstances to achieve similar levels, hence why most empires are xenophile by mid-game.