There are tons of reasons for that. Let me pull some of them from my butt:
Reason #1: Devs aren't Ops.
Reason #2: Devs need something new on their resume.
Reason #3: Certain type of Devs would read blogs and get excited and skipping scientific mumbo-jumbo and directly take the blogs as _the_ source of truth.
Reason #4: It's easy to bootstrap (schemaless, etc) your weekend project. Dealing with DB apparently is tedious for devs.
Reason #1: Devs aren't Ops.
Reason #2: Devs need something new on their resume.
Reason #3: Certain type of Devs would read blogs and get excited and skipping scientific mumbo-jumbo and directly take the blogs as _the_ source of truth.
Reason #4: It's easy to bootstrap (schemaless, etc) your weekend project. Dealing with DB apparently is tedious for devs.
I'm sure others can add more...
Let me feel your love HN-ers ;)