There really does need to be additional checks on Supreme Court Justices, because Congress clearly isn't doing its job. Both the Executive and the Legislative branches are directly answerable to voters, yet the Judicial branch is strangely absent from that ongoing check on their power. I get that we don't want Supreme Court Justices having to campaign for their position, but at the same time, voters should have some direct say in who gets to stay. We clearly had at least two unqualified justices added to the Court under Trump that should not be there.
In the history of the Supreme Court, only one Judge has actually been impeached, but wasn't removed. Another ended up resigning after impeachment was threatened, but that's likely when people actually had a sense of shame and resigned when they were caught doing something wrong. We're at a point now though where one part will simply deny reality and/or any wrong-doing, claim it's just the other side being political, and ignore it.
So calling for him to resign is just sort of a nice-to-say thing I guess, at least it's on record that somebody said it, but it will ultimately go nowhere.