Not to me it isn't. Besides not being a fan of fighting my way into buying stuff, I really enjoy using the Friday after Thanksgiving to just kind of relax, do whatever finishing-touch-clean-up there is to be done after The Big Day, and spending a little day-after-Thanksgiving hang-out time with whoever happens to be in, or come by, the house.
Also, somewhere between the long-running, post-dinner, Thanksgiving time we have that runs into the middle of the night, and getting up in the morning that next day, I have to sleep so I can be up early enough to start that whole day-after-Thanksgiving, traditional, stuff we do (like eating pie for breakfast lol or else making a nice breakfast for someone). It's what I've always done, but maybe because my kids are grown now, that time with them (and then time with them and their father and/or others the next day) is even more important to me these days. As far as I'm concerned, the stores can run their sales; and the crowds can go buy into it all. Stores and shopping aren't going to cut into what I have that can't be bought and that will likely change once my kids start having their own families.