Been using it for years and it’s been solid.
Is this reckless? Reading through all this makes me wonder if SSHFS (instead of NFS) with limited scope might be necessary.
Suppose you have the media server in its own VLAN/Subnet, chances are good that the firewall is instrumental in enforcing that security boundary. If any part of the layer-7 attack surface is running on the firewall... you probably get the idea.