Yes, they are supposed to be taken seriously. Lazy sysadmins are the best sysadmins - I'm sure the same is true of programmers.

Note that "lazy" does not mean "does not want to work". As per the linked article, in this context it means:

"The quality that makes you go to great effort to reduce overall energy expenditure. It makes you write labor-saving programs that other people will find useful, and document what you wrote so you don't have to answer so many questions about it. Hence, the first great virtue of a programmer."