Why even bother closing on Thanksgiving?

Target employees are seeing red after the retailer announced its stores will open at 9 p.m. on Thanksgiving night, cutting into holiday time for workers. An online petition asking Target to not open on Thanksgiving has over 179,000 signatures, and the number continues to rise.
This year, Walmart, Toys R Us, Kmart, and Sears are all opening their doors at 8 pm Thursday. Together with Target, that's two to four hours before they kicked things off last year.

Thanksgiving has always been my favorite holiday, because there's so little to it: No costumes, no gifts, very few traditions besides gathering together with loved ones over a meal. I guess it stands to reason that retail chains hate Thanksgiving because there's no money in it for them, so now they're encroaching on the holiday in some disgusting ways. This is just incredibly disappointing.