This is absolutely right. I built Wavefront's telemetry store and entity store directly on top of it and for all these reasons you can do magical things using it natively. These are also the reasons I recommended it for Snowflake's metadata store. Finally, it is why I invested in the company. FDB is insanely good if you take advantage of it.
FDB is fault-tolerant, auto-scaling, auto-healing, and auto-sharding. The sorted bytes-to-bytes map data format and multi-row transactions lets a skilled developer build almost anything on top of it. Atomic operations let you do things with higher performance without worrying about conflicts. Ops can be a learning curve but it is mostly because people run it at the red-line 24/7 for maximum efficiency. If you were running it at 3/4 capacity you would never worry about it at all. A single binary for all roles makes it very easy to deploy.
