I can certainly see that as a valid point, but my laptop is (fortunately?) my own. I wouldn't really want a company issued one, since I have no intention of ever spreading my workflow to multiple machines. As for viruses I honestly haven't had one since I last was using Windows as my main OS around 2007.

EDIT: Of course, I'll acknowledge that not everyone can be in the position of dictating what they use for work and requirements my force you to.