This argument isn't _that_ compelling because: send today's tech back a century, use that as your aliens in case 'c'. They would 100% be able to see that tech. They wouldn't know what the hell they're looking at, or be able to do much about it, but they'd see it.
Sending the tech from 100 years in the future to today is not directly comparable to sending today's tech 100 years back.
By 2125, military aircraft will probably be silent, able to rapidly ascend to 100,000 feet (out of visible sight), and maybe even invisible. So people today, faced with properly-done future technology, can't see it at all.
Either that is completely bullshit, or it’s technically-bullshit.
1. They don’t have to censor because their sources censor for them. “Oh we’re just an aggregator of censored results” doesn’t mean “this is an uncensored search engine” like the claim would have you believe.
2. Proof of this is evident in by comparing Russian yandex.com, my now go to for anything related to hacking, pirated anything, topics of censorship or controversial discussion, even “legit” but rarer information like how to train or use X or Y AI model, etc. The domains that appear on yandex remind me a time gone by. Like image search before Pinterest, unreliable but not sterilized.
3. I use DDG everyday. In the last year or so, I have found myself going to Google, Bing, Brave, Yandex, SearX, and other more than ever. The quality of DDG has for me, unquestionably slipped. I have a strong distaste for Google, and have used them this year more than ever.
They are not uncensored, although maybe they allow that burden to be done for them to keep their nose high in their air on the topic.
However, I fear it may be a moot point as I find myself looking elsewhere often now.
If the source has not put something on the web... how is anyone supposed to get past that? Or am I misunderstanding your statement?