why are you trying to make claims about them?

I didn't think that stating that libertarians like Ayn Rand was controversial. We are talking about political power and neither libertarians nor objectivists have any. In this context the fact that they don't like each other is a small family squabble in some far-off room of the Grand Political Palace.

intellectual fixing of errors

What is an "intellectual" fixing of an error instead of a plain-vanilla fixing of an error?

Aubrey de Grey says there's a 50% chance it's 100 million a year for 10 years away.

What's the % chance that he is correct? AFAIK he has been saying the same thing for years.

it's most scientists and funders not wanting the best available ideas

You don't think that figuring out which ideas are "best available" is the hard part? Everyone and his dog claims his idea is the best.

most people are pro-aging and pro-death

I don't think that's true. Most people don't want to live for a long time as wrecks with Alzheimer's and pains in every joint, but invent a treatment that lets you stay at, say, the the 30-year-old level of health indefinitely and I bet few people will refuse (at least the non-religious ones).

can and should be explained in terms of culture, memes, education, human choice, environment, etc

Why is there a "should"?

The twin studies are garbage, btw

All of them?