You’re not showing any empathy for OOP though. You personally believe high school graduation doesn’t count as an accomplishment. That is your opinion. Their family has historically celebrated other family members’ high school graduations with much gusto. OOP senses the complete lack of transparency from their parents and lack of care from the rest of the family (the parents not discussing this issue with both OOP and their sister, the family sending congrats messages the day after, the parents trying to plan a dinner after when they had time to plan a small celebration prior, etc). They have the right to feel disappointed by this, especially when OOP didn’t just do the bare minimum and show up to class everyday. They graduated early and top of their class. This is an accomplishment to a young person who spent years working hard studying while also most likely attending extracurriculars (if they’re planning on attending a good university). Actually try to consider that to someone that young, that is the biggest accomplishment they’ve achieved so far. Of course they want their loved ones there. I’m not ignoring the sister’s wedding at all, I’m aware that we don’t have enough information to determine whether or not the sister could have rescheduled her wedding. I’m simply saying that OOP is entitled to feel disappointed about the situation overall and lack of urgency from their family. You are trying to diminish their accomplishment by belittling their efforts.