That may be your opinion but my wife watches shopping channels a lot, just like I watch CSPAN a lot. Just because you don't give a crap about those channels, which is your privilege doesn't mean that everyone would agree with you. I'm sure that there are those who would love to see shopping channels in HD. BTW some cable systems carry some of them in HD now.Umm, no. They don't need to waste any more bandwidth on channels like that. Next you'll be saying they should have the infomercial channels in HD. Its just stupid.
As rule of thumb I am glad to see any channel go HD whether I watch it or not because I know that others will like it.