Sure, but now SCOTUS can say they are not a rubber stamp for POTUS. "See, we just ruled against him. Sure, it's a case that doesn't really solve anything and only causes more chaos, but we disagreed with him. This one time."
They've actually done so numerous times already and have several cases on the docket that look to be leaning against him as well. There's a reason why most serious pundits saw this ruling coming a mile away, because SCOTUS has proven to not be a puppet of the administration.
and still this current ruling was a 6-3 vote.
You can still technically bring charges against the president for things they do while in office.
Practically speaking, after that ruling, you cannot, short of hypothetical scenarios so incredibly unlikely and egregious that even the incredibly unlikely and egregious acts of this administration don't meet that bar.
Several justices are openly taking bribes
If you look a little closely you'll see their current project is to establish the "major questions doctrine," which ultimately reduces executive power by stopping Congress from giving it all to the executive. It looks pro-POTUS when it reduces the power of executive agencies, and it looks anti-POTUS when it reduces the power of executive orders. It's really about resetting what powers Congress can delegate.
And even this ruling had 3 of them objecting, claiming tariffs should stand.
The president doing horribly fascist things with ICE like obliterating habeas corpus? Using the military to murder people in the ocean without trial? That's fine.
Screwing with the money? Not okay.
See also how the prez is allowed to screw with any congressional appointees except the federal reserve.
"also proof" is a strawman, plain as day.