No one is lecturing Progressives. People are lecturing Leftists.
Leftists range from progressives to communists, the vast majority of which are progressive in the US. You are trying to draw a very fine line here between two groups that almost completely overlap. In any case, you are wrong about nobody lecturing progressives.
Leftists have the numbers to give Republicans the win
Not if you exclude those that identify as progressives. If you include progressives, then the lie becomes the idea that leftists don't show up. You keep making that assertion, and it's absolute fiction. There is no evidence whatsoever that a significant portion of those politically engaged enough to identify as leftists don't show up for Democrats. What happens is that when the establishment fails to work with and reach out to progressives, they also fail to reach the fed-up Americans who have checked out of politics completely. Leftist/progressive policies are what drive engagement with many Americans who don't identify as leftists.
But leftists don’t have the numbers to win primaries or dictate policy positions without playing a game of brinksmanship.
Is this supposed to be an argument against leftists using brinkmanship? "It's your only weapon so you better not use it." I think your framing is nonsense, of course, but taken at face value it doesn't really make the case you want it to. Also, the biggest factor hurting progressives is the myth that they can't win in the general. Exit polls were crystal clear that Democratic voters favored Sanders on policy, but thought he couldn't beat Trump. Polling on Biden vs Trump and Sanders vs Trump was nearly identical BTW, but you would never know that from the media coverage. Incidentally, I'm wondering if you are aware of how AOC unexpectedly beat Pelosi's protege. She didn't focus on moderates, she focused on unlikely voters. Leftist policies are the key to grassroots outreach to disaffected (non)voters.
People are unbelievably, irredeemable stupid. See “Affordable Care Act” vs “Obamacare”.
The "people" you are talking about are the ones buried in the right wing media bubble. There is less than a 10% swing in approval ratings for Obamacare and the ACA.
See “I dunno why, I just don’t like the vibes of Hillary/Warren/Harris”.
I'm personally not big on the "Vibes" of Hillary/Warren/Harris either, and I'm guessing that indicates I'm sexist or something? Warren at least has a leftist bent, even if she is cynically an establishment tool. I'll take AOC/Porter/Omar please.
See “despite all the stats saying otherwise, I believe we’re in the middle of a CRIME EPIDEMIC”.
You might be a bit behind on the news, but it's recently surfaced that there were some major changes in how the FBI collects crime statistics that easily account for most of the drop Biden has been bragging on. Still, you are right that there is no evidence of a real "CRIME EPIDEMIC" nationally. Still, we are not talking about people that are likely to vote for Democrats here.
Moderate Republicans are generally okay with extreme positions as long as their core demands are met.
There is no such thing as a moderate Republican. All the worst things done by the first Trump administration were driven by and perfectly consistent with "moderate" Republican policies and rhetoric. Even January 6 was just the next logical step in Republican election rigging. Aside from the spectacle, it wasn't much different than the Supreme Court putting W in office.
Not the TV show. I don't know how faithful it is to the comic.