Ya might have quoted the wrong post because that's a post debating whether something is a good idea or not, which is exactly what this forum is for
I happen to agree with Thunder, and most wars aren't long enough that this risks being a major issue as protection is 72 hours while your kingdom is in war.
And if you war at a reasonable size instead of a miniscule size then a 400a province coming oop shouldn't be a meaningful problem.
So don't stay tiny and this won't ever be a problem regardless of how long you drag your wars.