You were spot on regarding the 17th.
Absent the 17th, if we still had a senate of the states, we would never have had a single member of Scotus who was hostile to the 9th and 10th amendments.
Scotus has done enormous damage to our republic, all because the states weren’t around to defend themselves.
Sadly it’s too difficult to explain the horrors of the 17th Amendment for there to ever be a serious push to repeal it.
I wonder what percentage of the public even know what the 17th Amendment did or how things were before it.