my thoughts on the sadness moodlet

I kind of have a problem with the sad moodlet system that we have going on here. I have quite a lot of sims in game, many of whom my household members know. But the thing is, they barely know these sims? There's like the slightest bit of friendship. Then those sims die, and my entire household is all miserable for 2 days. It's really annoying. If it were a friend, family member, or someone like that, I think it would make more sense, but they're constantly sad because of sims they legitimately barely knew are dying.

I also especially wonder why toddlers get the mourning moodlet. Toddlers, in real life, don't really understand the concept of death, as far as I'm concerned. If it were a parent or someone close dying, then sure they should get some kind of moodlet, but I don't think it should be mourning. I'm not sure, maybe a toddler-specific kind of sad moodlet. And as for sims they hardly know, I don't think they should get a moodlet period. Personally, it doesn't make sense to me.