Interestingly... I've never encountered the first scenario as a justification. I know it must exist, as I've read people describe it.
Every time I've been in a group where nosql was desired, it was because they saw it at a conference, or watched a youtube video, or read some blog extolling nosql virtues, and... yeah - that second option. They'd either never actually used nosql, or didn't realize what they were getting into, possibly because even if they'd used it, the larger architecture had SQL in it someplace, just outside what they could see.
Every time I've been in a group where nosql was desired, it was because they saw it at a conference, or watched a youtube video, or read some blog extolling nosql virtues, and... yeah - that second option. They'd either never actually used nosql, or didn't realize what they were getting into, possibly because even if they'd used it, the larger architecture had SQL in it someplace, just outside what they could see.