En que te basas para asegurar eso ???
 
Es perfectamente viable crear un alias para un comando, es mas todas las referencias a alias usan  ejemplos de comandos para ilustrar su uso, y la propia descripción del man menciona comando y en el ejemplo muestra el uso con un comando   
 Cita:  DESCRIPTION
       The alias utility shall create or redefine alias definitions  or  write
       the  values  of existing alias definitions to standard output. An alias
       definition provides a string value that shall replace  a  command  name
       when it is encountered; see Alias Substitution .
 
       An  alias  definition shall affect the current shell execution environ-
       ment and the execution environments of the  subshells  of  the  current
       shell.  When  used as specified by this volume of IEEE Std 1003.1-2001,
       the alias definition shall not affect the parent process of the current
       shell  nor any utility environment invoked by the shell; see Shell Exe-
       cution Environment .
    Los ejemplos   
 Cita:  EXAMPLES
        1. Change ls to give a columnated, more annotated output:
 
 
           alias ls="ls -CF"
 
        2. Create  a  simple  "redo" command to repeat previous entries in the
           command history file:
 
 
           alias r='fc -s'
 
        3. Use 1K units for du:
 
 
           alias du=du\ -k
 
        4. Set up nohup so that it can deal with an argument that is itself an
 
              alias nohup="nohup "
 
           alias name: