[imtringued]

If I was developing a rocket, I would prefer making it work first and then iterating on it.

SpaceX is iterating for the sake of a narrative. None of the development goals for Starship require reuse of the upper stages, that's a bonus that should happen after Starship started deploying Starlink satellites.

There is no point in having dedicated reentry tests. Every test flight comes with a free reentry test included.

Even if a company does iterative rocket development, it would never follow the SpaceX way of putting th most difficult but simultaneously unimportant objectives on the critical path at the expense of the essential objectives.

The development program of Starship is basically ignoring every aspect of Falcon 9 development that made it the success people take for granted these days.