Hmm... I think tantrums are a negative behaviour? Yes, it is due to a whole lot of things - pent up emotion, lack of ability to communicate etc. But I see it the same as say, hitting because they are unhappy with an outcome. It's understandable for a kid to do it because they have no other way to communicate their displeasure. It's still a negative (undesirable) behaviour.
Anyway, sounds like it's irrelevant. I hope I haven't offended - just offering a different perspective.
BTW, I have edited my post - I don't find tanties harder to deal with at home, LOL! Meant 'easier'.