True, but it was a larger issue than just Steve Jobs. If you read the histories of those who did great work at PARC, it appears that Xerox had NO way to commercialize their work:
* Apple, Microsoft, GEM, Amiga, etc, etc all shipped the GUI
* 3Com, Cisco, etc, etc, all shipped Ethernet
* HP, Canon, etc, etc all shipped laser printers. (Xerox did too on the VERY hight end, mostly as part of a copier)
PARC's Team actively moved to or started firms that shipped their ideas.