While we have had our disagreements, I am on vehement agreement with this notion. The SCOTUS perceives literally zero threat to their ability to grant or remove power. This is something I use in conversations in person with people who disagree with me on certain social issues, that they need to be cognizant of supporting outright authoritarianism.
Mitch McConnell specifically said to get the Country you desire you must capture and mold the Courts, which was something the Federalist Society dedicated its entire existence to, funded by the billionaire class who desire a more cemented underclass beneath them. To do this, you must remove power from the public (prosecution) and also from agencies that can act independently (the press, Comissioned agencies). I mentioned this before but in the early days of US Governance States started passing wildly progressive legislation for the day...like wanting to abolish slavery. Some of the men who were in power then realized what was coming, giving power to the people (direct democracy) would end up in the people voting for them to be less wealthy, via checks on the means to amass their wealth. I forget who it was recently that accused the Biden administration of "declaring War on crypto"...but if you even look at just one crypto scam, say Logan Paul's "Crypto Zoo"...that guy should be in prison and not parading around with WWE Titles.
The point is, if the public had say most of these robber barons would be in prison. That's HOW the legal system would be used. However now it's being used as asset protection for Big Oil, Big Pharma, Big Sugar, all of whom want the continuation of bad Neo-Liberal economics, deregulation, and a disarmed working class to combat them. They want Presidents (or a King, they dont care which) who will cement the oligarchy via promises of tax cuts, and a lack of enforcement of regs that exist to protect the public.
But the bottom line is about being RULED, not represented. The SCOTUS is rogue. These idealogs, again selected by a "Society" whose sole purpose was to convince people who otherwise would have gone into clergy to instead become lawyers and judges, are convinced they are our High Priests. As you said, they are appointed...and their friends in the Senate even blatantly rigged the appointment process by lying (McConmell lied about appointing justices during an election year right to America's face), which even further demonstrates that this is wielding power for sake of wielding power. And giving power for sake of giving power. This should boil the blood of any American who believes in opposing "taxation without representation"...any American who despises the idea of living under monarchy, any American who has EVER declared their opposition to being under the boot of wealthy elites. And yet here we are having our rights re-shaped and revoked largely by people who we know for a fact are showered with gifts by the donor class.