"rhgb quiet" controlling the display of commands in single user mode ?"rhgb quiet" controlling the d

Why does removing "rhgb quiet" from the kernel boot parameters control whether or not the commands I enter are displayed in single user mode ?

For instance, if I do not remove "rhgb quiet", when I am in single user mode, whatever command I type will not be displayed on the screen.

The commands will work, but nothing is shown.

Eg: ( entering whoami as the command )
sh-4.2#
sh-4.2# root