Then that is a failure of the people who started those realms.
If you are creating a new realm, and don't line up allies, you're pretty dumb.
If you are creating a new realm with a lot of depopulated regions, and don't line up allies, you're a good candidate for the Darwin Awards.
As a ruler, I have attempted to increase diplomatic relations across the continent as a whole regarding my realm. While I agree with you that those who don't line up allies are foolish to do so, there are some realms that they do not have options, created by the diplomatic climate(e. g. Armonia, Eponllyn, Dunnera).
