Rabbi Avigdor Miller, tzl went to very few Simchas, even of his Talmidim. do YOU know why? I dont. I can surmise, but i dont know. But I DONT QUESTION HIS DECISION.
Feivel,
The reason Rav Avigdor Miller ZTV’L almost never attended chasanas (etc.) even for direct family, was because he felt it was bittul Torah (for himself.) Rav Miller never wasted a second and accounted for every moment of his time.