I think his point is thus; all he really needs to do is land a little quickly, get away from the jet, and have everyone who might have breathed in something a bit funny checked by a doc.
However, if he shouts pan three times to declare an "emergency," which gets him his priority, he's then faced with reams and reams of paperwork, incident reports, details etc etc.
If the paperwork's getting so ridiculous that people are loathe to declare a pan, then that's a bit troublesome really.