Supreme Court function is a hot button topic right now because of Roe v. Wade. The vast majority of Americans agree that at the very least SCJs should have term limits, so start there and force a vote on an amendment. Then if it fails, you have votes on record for the next election. Many Republicans have pro-choice, pro-union, anti-lobbying stances that aren’t aware that their representative in congress would vote against because it never comes to their table in the first place. Some(not all) would change their vote from red to at least 3rd party if we were able to highlight those issues in voting records during campaign season.
And even if you feel that isn’t worth the time or energy for only speculative shifts in the public vote, the opinion you’re expressing is that the constitution should remain unchanged until some undetermined date in the future which may never come. And that is more damaging to the bureaucratic system than a proposed amendment failing because definitions shift over time. It wasn’t too long ago that property was determined to include black people because it suited the interest of wealthy land owners in the south. Then because of that we ended up fighting a civil war.