The ethereum community thinks they have found a flaw in our narrative, and they are working with an alternative narrative.
In the ethereum narrative, PoS is better because the network has more capability to punish validators who behave incorrectly.
They feel that our narrative is flawed, because they think that this kind of soft fork bribery attack can be done against PoW as well. Vitalik explains on the bottom of this page
https://blog.ethereum.org/2015/01/28/p-epsilon-attack/The attack that Vitalik is describing, it is the same thing as paying all the tx fees + all the block rewards to completely fill up blocks and censor the network from continuing.
bitcoin txs reference a recent hash. if you try to rebuild history for a double-spend, you can't include the txs from the valid side of history. So you aren't just undoing the one tx you want to attack, you are undoing significant activity.
Even if your side of history technically has more work, that doesn't necessarily mean that it will have the most value.
PoW is useful for decreasing the total number of alternatives to be manageable for us to agree on which version is the valuable version. The community may decide to update their nodes and wallets to ignore the attack-fork.
If this attack is done against PoS, it can permanently destroy all the value in that blockchain, and the attack is cheap.
If it is done against PoW, it can temporarily prevent any txs from getting processed, and the attack is expensive.
I think at this point the ethereum community is already undergoing significant institutionalization.
Inside of Ethereum, if you want to succeed, you need to be loyal to the gatekeepers.
There are certain topics that are taboo for ethereum devs to talk about, because they will stop receiving funding and community support to develop on Ethereum.
Certain ideas are not worth the risk to think about.
If there is a powerful person who you depend on, and talking about flaws in PoS makes them look bad, then you would not think about flaws in PoS.
There are a few very rich people who have risked their entire reputation on the idea that PoS is possible and will succeed, and they raised lots of money on this idea.
If you want to receive any money from these people, then you need to avoid ever mentioning flaws about PoS in public.