It is great for you that you thought it's fine. It's a RPG though and I should be able to choose how my character reacts when the love of her life is about to turn to cinders. She'd make sure, he gets to safety and healed. Instead my character is forced to ignore him. That is in no way, shape or form how any of my characters would ever react. Astarions pain and fear are just brushed aside.
That's why I ask for the option to choose: either follow him or ignore him (for the people who are fine with the scene or don't care about Astarion).
Besides, the other companions get their huge moments handled with dignity. Imho Astarion loosing immunity to sunlight is a huge character-defining moment as well (let's not forget, Larian has him say that perhaps the changes were permanent. They had him get his hopes up). Why is his huge character-defining moment turned into a tasteless joke?
Sorry for causing you emotional distress, that wasn't my intention.