I apologize for being short with you in my previous response. I need to be better about assuming good faith.
Your response seems to betray a certain ignorance of mongo. Don't you realize that mongo has indexes?
For handling documents, this blog post covers the topic in some depth.
https://jimb-cc.medium.com/postgres-jsonb-meets-mongodb-part...
Might I suggest you actually use mongo on a project before engaging further on the topic. It clearly has had a lot more thought put into it in the context of json documents.
If postgres works great for your use cases, great, go be happy with the tool.
