Sometimes, I take part to events when participants are supposed to come on time.
Most of the time, one or more people arrive late.
The organizer generally decides to wait for everybody to arrive, only then the event starts.
What happens the next time? Everyone is late, nobody arrives on time anymore.
In my opinoin, if an event starts at 8:30 AM, then it should actually start at that time.
Those who want to take part to the beginning of the event will arrive at 8:25 AM.
For those for whom the sleeping part is more important, it’s OK if they don’t catch the full event.
Think of it this way – who would you want to please? 10 people who arrive at 8:30 AM or ealier, or one or two people who are 10 minute late?