Modern databases give you tools to evolve and refactor a relational schema over time. Views can be such a tool, Postgres also has transactional DDL changes.
Tooling has nothing to do with the schema evolution, normalised forms (4NF, 5NF, …) do. The trouble is that almost no-one does that. Relying on the tooling alone is either a self-delusion or the lack of experience. Usually both.