That's not what the thread is about at all. It's about why there isn't a split for people who want to sit and for those who want to stand. The only person who brought in what everyone should do is yourself, when you wondered why anyone would stand in a seated area which was designed for seating.
It's very annoying when you want to stand and sing, and someone beside you or behind you tells you to sit down. Both should be catered for.