Because when you simply accept the world as is, it looks a lot like you're endorsing the status quo. Especially on this site where a lot of people seem to take a weird pseudo-detached outlook. Trying to analyze things in an almost entirely emotionless judgement free manner. I think this is seen by people as enlightened.
Personally I find it genuinely disturbing. It becomes hard to tell where this sort of detached analysis ends and where it becomes just actually not caring about or not seeing the moral issues here.
This isn't really the site for people who want to create genuine social change in the world, other than through startups. The site guidelines say that what's on-topic is "anything that gratifies one's intellectual curiosity". Curiosity is more about knowing things than doing things. I think one implicit belief held by the folks who started this site is that if you do want to challenge entrenched power structures, the best way to do that is to be very circumspect about who you tell that you're challenging power structures, because you can expect to have a strong negative reaction from the power structures themselves. (Peter Thiel describes startups as "a conspiracy to change the world".)
There are other sites on the web that are attempting to organize people for large-scale social change, ones that are presumably watched (and cared about) by the FBI, as opposed to just being watched (with idle curiosity) by the FBI.
Peter Thiel has an extremely vested interest in preserving the status-quo. Frankly I think the notion that he knows all that much about genuinely creating any sort of movement to be questionable at best.
It's not about changing the world it's about not dehumanizing everything.
Because when you simply accept the world as is, it looks a lot like you're endorsing the status quo
It looks that way only to a particular subsection of society (leftists). Given your staunch defence of unions the other day I guess that's very much consistent with your expressed outlook here.
For conservatives accepting the world as it is doesn't automatically imply endorsement or support for the status quo. It only means you accept that the world is big, you are small, and for almost all problems on a social scale there's either nothing you can do or - just as likely - any attempt to fix it via social engineering will make things worse rather than better.
This is because they view most social problems as inherent to human nature and human nature as essentially fixed. If you can't change human nature then many apparent social ills are unfixable, and indeed can't even really be described as problems to begin with, no more than people's inability to fly by flapping their arms is a "problem".
To leftists this conservative acceptance often looks like coldness, lack of compassion or outright support for the existence of problems, a view which unfortunately can often then be used to justify nastiness, no platforming, aggression or even violence against them. But it's not any of those things. It's just acceptance.
Personally I find it genuinely disturbing. It becomes hard to tell where this sort of detached analysis ends and where it becomes just actually not caring about or not seeing the moral issues here.