I agree with the part about big corporations not actually caring about it, and that both the decision to stock and the decision not to stock are made cynically by a company like Target.
What I don’t agree with is that getting mad about not having Pride stuff is equivalent to getting mad about not having Super Bowl stuff. Football fans are not an oppressed segment of society that has feared harassment and violence. There is not a constant threat of legislation aimed at harming their community. It’s also not important that football fandom is normalized by society at large.
So even if we were talking about the Super Bowl, if 5-10% of people in the UK actually were American football fans, and were under constant threat by UK society, then it would be completely understandable to get mad at Target for being cynical about even that! Indeed, I guarantee in those places where Target isn’t carrying pride stuff, there are LGBTQ+ people living there.