Easy to say when you haven't been there. No, it's not about one's emotions. I'm going to take a shot and guess that you have never met the "reality" of death. I've caused it, dealt it, and also from the other side seen people I was responsible for die. When I thought it was all over, and I was away from it, I got a rude awakening through sudden massive totally unexpected heart failure.
Reality? You just have never experienced love. There's more to that than just "emotions". Truly loving someone becomes a way of life. Part of you understands the "reality" of death, but the majority of you becomes a part of someone else, and they with you. When that gets taken away, it's very disrupting, in practical terms as well as emotional. It's different than losing a parent. I've even had people try to compare it to losing their cat. What sad, sad people.
No, you don't understand a single thing about the reality of death. You will, but not yet.