Edit:on rereading I'm basically parroting the same thing you are,I think it's just a matter of how cynical one wants to be with the intent of the OP and other commentors are. Pretty much impossible to quantify without being in their brains,and a perfectly valid thing to be looking out for.

I think the biggest difference between the two, specifically the Starbucks CEO and Swift, is one of visibility. Fucking EVERYONE knows who Taylor Swift is. She lives one of the most public lives. Hers is a name that's often right on the tips of everyone's tongues.

Contrast with the Starbucks CEO. I don't even know his name. I remember reading (largely from memes on here) when he was saying he'd fly across country to work in office instead of working remote. And I remember a HUGE backlash from that here. Another contrast is, I do not remember seeing ANYONE say the Starbucks CEO was actually decent and this is just one thing, or that there's actually a good reason for this choice. Absolutely everyone hated it.

Those died down. They didn't have longevity. Largely because Mr CEO isn't a household name. I'm still pissed at him, too, but it's harder to make the same point as broadly using the nameless CEO than the person everyone knows.

Edit: I think the thing that annoys people about the hypocritical stance is that she has, on multiple occasions, been staunchly for climate conservation. To use the rape quote you provided, it'd be like if Cosby was saying "rapists should be punished. Rapists are the worst. Rapists should be in prison" then he's found to be raping, and suddenly wants some leniency. If you're outspoken about a thing, clearly you know it's wrong, and so I shouldn't have any qualms about the punishments levied.