Am I being simple?
Isn't the point of the throw away 'rocket' just that?
You don't have to make it strong because the fuel creates the integrity until it is done with?
Why do we have to recycle what is essentially junk?
Is this all 'clever but pointless'?
You re being simple….
Neither stage is throw-away, both booster and Starship upper stage are supposed to recover, turn and relaunch on multiple occasions.
The booster only has a mission length of 6-8 minutes and is caught back in the launch tower, the aim is to refuel and launch several times a day.
There are several Starships models, some are designed to carry payload into orbit (e.g. a couple of hundred Starlink satellites) and then recover, be caught in a tower and relaunched. No set schedule as missions might last days or even weeks. Others are designed as lunar landers and will not have heat tiles or flaps but will have extendable legs; others are tankers and, if not planned to recover, may be adapted to be converted into habitat modules for space stations.