Originally Posted by
tdracer
Alternates are usually intended for 'land at nearest suitable airport' purposes - basically no other choice but put the aircraft on the ground as soon as practical.
When you have a perfectly serviceable aircraft and the destination airport is unexpected closed, planned alternates don't hold as much meaning.
Planned alternates are exactly for problems at the destination airport. Weather, closed runways etc.
You are confusing diversions with alternates.