No, with Mongo you get a bunch hacks you need to do to maybe get indexed reads. I had to write a query optimiser that does lots of crazy things and simply rejects some entirely reasonably-looking queries because Mongo can't do them efficiently.

Not to mention the complete lack of durability. Even Redis is more durable.

Postgres is trivial to use. Is something slow (which will happen much later than with Mongo)? Add an index, done. I'm not a DBA, you don't need one.