I'm going to give you the same answer everyone else gave you,
It Depends
In a simple scenario with a single server that returns data (READ Only), Yes file system will be great and easy to manage.
But, when you have more than one server you'll have to manage distributed files system like glusterfs, ceph, etc..
A database is a tool to manage all of it for you, distributed files system, compression, read/write, locks etc..
hope that's helpful.
