I'd agree with you here, except that this is a system printer file - I'm always reluctant to change system objects.
As you say, to each his own. I've placed the ChgPrtF command as well as
a bunch of ChgCmdDft's into a CL that will be run each time a new OS
release is applied.
I guess you could play it real safe and copy the printer file to a
library that is higher than QSYS and change the copy.