Nobody "lets" someone win an election. Progressives need to earn their votes like everyone else. And if they earn enough votes, then they win regardless of what other Democrats think.
That's the usual explanation leftists give. But I'm not sure Democrats should listen to that, either.
Especially since the largest shifts towards Trump in 2024 occurred in the Latino and Gen Z male demographics. Both of them are more centrist than average Democrats, and they are the demographics that Democrats need to win back in 2028.
I'm not a fan of the Green Party, either. Among other things, they gave us Senator Sinema.
But if leftists want to demonstrate that they are better than establishment Dems at winning elections, then leftists will have to win elections. Starting with primaries.
And yes, others will try to "tear them down" from all sides. Intraparty fighting never ends, even after winning an election. Just ask Joe Biden. That's the nature of politics, which leftists often don't want to face.
The goal of leftists is to complain and by that standard, this past election was a resounding success. And nothing else, including winning elections, matters to them.
You seem to be starting with the assumption that market prices should reflect fundamentals, and questioning why they don't. But why do you assume that?
"In the short-run, the stock market is a voting machine. But in the long-run, it is a weighing machine."
I don't care if the market is under responsive to fundamentals. That just means some investors are exercising poor judgment by paying too much attention to irrelevant factors. It also gives an opportunity to investors with better judgment.
If you're a value investor then you believe that the actual value of a company depends on its current and future earnings and the market price will tend towards the actual value in the long run.
But naturally there are other factors that also influence the market price. In fact, the whole point of value investing is to find stocks that are "underpriced". For various reasons, they are currently priced at a discount to their actual value. Those are the stocks you should buy, and you should expect their price to increase.
Conversely, for various reasons some stocks are "overpriced", like Tesla. You should not buy those, because you expect their price to decrease in the long run.
A corollary is that value investors expect seemingly irrational price movements like we see with Tesla. If share prices perfectly reflected fundamentals, then it would be impossible to find a "good deal".
I don't believe leftists actually know "the only way to win elections and hold power", considering they have accomplished neither.