Exactly right on all points. Just Google all the 5-4 decisions and every single loss is a hit to the environment, to individuals wishing to hold corporate interests accountable, to women's rights, to gay rights, you name it. If you asked most Americans they would be for what SCOTUS has just ruled against. They get away with it because the "liberal media" takes it's marching orders straight out of Republican talking points e.g. Hillary's emails and Obama's birth certificate. All distractions while they rob the people and the planet blind.
Most voters realize that unfettered public sector unions are killing state budgets, so Janus was widely favored.
Most voters realize that balancing secular rights vs religious rights is thankless so I think lots of Americans favored the Masterpiece decision.