Anecdotally, this rings true for me. Father walked out on mother essentially, when I was in my early 40s. Rocked my world thoroughly, hadn't seen it coming. Several years of therapy to come to terms with it.
Interestingly, their relationship became much better after and they are ok as friends now.
GP’s comment vs yours mirror my brother’s reaction vs my reaction when our parents divorced. Same divorce, completely different feelings about it.
Even within the same family, both divorce and dysfunction can be experienced very differently due to differences in each child’s individual psychology and also family dynamics (sometimes one child is made to bear the brunt of the dysfunction much more than the others-the “black sheep” versus the “golden child”)