You're trusting that Barrett is going to rule based on an objective understanding of the law rather than right-wing ideology, though. Isn't that naïve given the circumstances, though? Trump and the Republicans want Obamacare murdered. All of it. She's a hired gun. Why should she betray those that are inherently going to give her the job that she's dreamed of?
Look at past Supreme Court rulings with Gorsch and Roberts particularly, and you already have conservative political activists saying that they're too independently minded and insufficiently hackish. They don't automatically accept whatever the conservatives want all of the time, and that's something that they're expecting to get with Barrett. A bobblehead for their side.
Granted, Barrett's record is rather squeaky clean as far as ethics goes. But we're talking about Donald Trump, the modern modern conservative movement, and the Republican Party, here. They could sell residents of the Sahara Desert sand, for crying out loud.
Wouldn't you at least feel tempted to obey Trump's whims if it meant your own dream job, personally?