Why Can't I Use {xen:helper richUserName} Instead of <xen:username />?

[James]

When trying to replace:

<xen:username user="$user" rich="true" />

With:

{xen:helper richUserName, $user}

The user name isn't rich. Don't they both use the same data to retrieve the rich username?

 

[Jake Bunce]

I looked at the code. This is the equivalent template helper:

{xen:helper username, $user, 0, 1}