For niche uses of database I am sure this is true. But if you are not in that niche, then Postgresql is usually a much better choice. For example Firefox uses SQLite, because it wants to store lots of application specific data. It is good for that.
Personally, I find the tooling, documentation, familiarity and quality of Postgresql makes it my choice even in situations where SQLite might work.
Personally, I find the tooling, documentation, familiarity and quality of Postgresql makes it my choice even in situations where SQLite might work.