Black Friday Beginning on Thanksgiving. Those Poor Employees?

I keep hearing all these people say what a shame it is that the poor Wal Mart, Best Buy etc workers can't be with their families on Thanksgiving b/c of the stores opening earlier and earlier. I had one coworker basically call me an a-hole b/c I have no sympathy for them.
I asked him where he was when hotel workers, plant workers, restaurant workers, non essential medical workers(lab techs, accessioners, couriers), bus drivers, pilots, flight attendants, etc, etc etc have had to work holidays forever?
I got silence, but God forbid the wal mart employee have to work a day they were told they would be working when they were hired. Am I wrong for thinking that if you don't want to work holidays then maybe find a job that doesn't require you to do so?