There’s an interview Tim Dodd did with Elon where they talk about the difference of approach between Falcon and Starship.

Falcon had to be built on simple and proven hardware concepts because private commercial space flight was unproven and considered very risky.

Now that SpaceX has proven the impossible is indeed possible to the world many times with reusable rockets, private manned space flight, and an affordable satellite data network—they can raise the capital and field the team needed to build a proper space launch system, which we now know as Starship.