While it is correct that it is a housekeeping issue, it also is an issue with proper chemical pest control. Just as lice can be picked out of hair and their eggs picked off of hair follicles with due diligence and eliminate the problem, that would require excellent vision and checking each hair follicle. Bedbugs can be searched for in the seams of clothing and mattresses and through carpet, but chemical control in both cases makes a whole lot more sense. Both bedbugs and lice had been virtually eliminated in the developed world prior to the ban on DDT. Travelers to areas where both still exist have reintroduced the pests worldwide. And luckily only a small fraction of the eggs hatch because they do lay prolifically and with a fairly short reproductive cycle.
And yes, Arch, this was a comment on a recent discussion here.