I'll take inexperienced legislators with fresh ideas who understand how the world actually works over 80 year old careerists whose only skill is fundraising and who still see the world through the lens of Cold War great man politics. Long tenure is how you get entrenched power dynamics, dynasties and eventually dictatorships, and government locked in eternal stasis and unable to adapt to modernity.
I'm really starting to think Thomas Jefferson was right and every 20 years we should just burn Washington to the ground, rip up the Constitution, hang every politician and start over, and make the new blood walk through the corpses on their way to work just to keep the fear of God fresh in their hearts.
FFS, Hillary Clinton had the long tenure. She had experience - implicitly as first lady, and explicitly as governor and secretary of state. She campaigned on policy. She lost to a buffoon conman sex pest with no political experience whose reputation hitherto was playing himself on tv.
Am I saying Hillary Clinton was a better person than Donald Trump? No. I'm not even saying she would have been a particularly good President. But I'm just pointing out how little "reputation" actually matters to American voters, because she was obviously vastly more qualified for the job, and if that mattered it wouldn't have been a contest at all. But the one thing Americans hate more than an experienced politician is an experienced legacy politician. FFS the most popular American President in recent history was an actor who had Alzheimers in office, and got advice from his wife's astrologer.
What he have is already an absolute catastrophe, an utter circus. The competent, well-meaning civic minded politicians you're referring to don't exist, nor does the educated, discerning voter base necessary to put them into office. People voted for Donald Trump the second time because they thought he could control the price of eggs. Like there was a fucking knob somewhere and Joe Biden just didn't want to turn it.
The least we can do is try to minimize the damage any specific idiot (in the voting booth or in office) might cause.