Why lvm2-lvmetad.socket is still running after reboot, even though it is disabled using "systemctl disable lvm2-lvmetad.socket" command?

Issue

• I'm trying to disable lvmetad. I set use_lvmetad = 0 in /etc/lvm/lvm.conf and also stopped & disabled lvm2-lvmetad.service. However, I see that lvm2-lvmetad.socket is still running, but it comes back "active" upon reboot

# systemctl stop lvm2-lvmetad
# systemctl disable lvm2-lvmetad
# systemctl stop lvm2-lvmetad.socket        
# systemctl disable lvm2-lvmetad.socket

• After reboot

# systemctl status lvm2-lvmetad.socket
● lvm2-lvmetad.socket - LVM2 metadata daemon socket
   Loaded: loaded (/usr/lib/systemd/system/lvm2-lvmetad.socket; disabled; vendor preset: enabled)
   Active: active (listening) since Mon 2017-05-01 09:15:29 CDT; 37s ago
     Docs: man:lvmetad(8)
   Listen: /run/lvm/lvmetad.socket (Stream)