This makes sense, but also not surprised. In today's world there are countless Postgres providers (Supabase, RDS, DigitalOcean, GCP, Azure, etc) so there is plenty of choice now. Although I don't see why anyone would choose niche providers today other than the cloud provided ones like RDS now.
Because RDS forces you to deal with the AWS behemouth instead if just changing your database connect parameters.
This is one of the things I quite liked about Azure, funnily enough. They basically give you a connection string. It's not ideal, and I think for production we did something slightly different with Azure identities, but it got us going quickly, and the identities thing devops just swapped in later behind the scenes. Other than that it was just regular Postgres.