As a programmer who is admittedly attracted to Mongo, a large part of it is simply its ease of integration. I'd happily spend more time familiarizing myself with SQL if it were less of a pain to integrate into my projects.

The first time ever using Mongo I had a cloud cluster connected and working in about 10 minutes after signing up. Trying to integrate SQLite took me around 1.5 hours before it was functional. To this day I have yet to set up a real cloud SQL database because the one time I tried it with PostreSQL I just couldnt get it to work.