Ineffective standup and planning meetings are a waste of time, a lot of the time. But how do you truly know WHAT you should on focus and deliver without having

Ineffective standup and planning meetings are a waste of time, a lot of the time. But how do you truly know WHAT you should on focus and deliver without having a clear understanding of the broader picture and without breaking apart work for the week, especially with a team where everyone is at completely different steps and working on completely different things?