Need 3 good reasons why XSLT is better than JSP+Veloci

Wondering if anyone could shed light on a debate I've been having with
web developers.

If the source content for my web site is a stack of XML files, XSLT
seems like the obvious choice to assemble, format and generate the
output XHTML pages.

But many web developers tell me that they'd rather use Velocity
templates in conjunction with JSP to accomplish the same thing, whether
the source content comes from flat XML files, an XML repository, or an
Oracle database.  They know Java, they argue, so why bother with XSLT? 

So I'm looking for three good reasons why they're wrong.
 
Thanks,

Wes 

 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list