The notion that divorce is simply a “d-word” is, with all due respect, nonsense.
First, I would not make light of the mizbeach crying if one divorces his (first) wife, CH”V. That’s a serious statement.
Divorce has many ramifications and, for that reason alone, it should not be utilized unless it is truly necessary to do so, as opposed to anything less than necessary, including specifically *childish* divorces.
It is oftentimes also a tragedy because it is often avoidable given proper communication and proper mindsets before any nastiness starts. So it is, sometimes, a tragedy that did not have to happen if the players were both up to speed. Aseh licha Rav (uknei licha chaveir), and marital therapy as appropriate, would probably be extremely useful in nipping in the bud any potential trouble before it becomes a real issue.
Again, in cases of abuse or even for less serious issues, it would seem obvious that this is why Hashem, in His infinite wisdom gave us the framework for instantly ending a marriage in a halachic fashion. But this is not a decision to take lightly.
And the fear of divorce is not what will keep a marriage healthy. If that’s what’s keeping a marriage together then there are obviously underlying issues that must be worked through to keep the marriage truly healthy. But fear of it is obviously not the purpose of divorce nor the cause of lasting marriages.