So only people with role models close to them or in a place where inspiring things are happening should be inspired?
Before YouTube and the Internet in general, only affluent people had these things, and we left behind a huge portion of the worlds population. Those people have the same potential as people of means or the luck to be born in an affluent country or an urban area.
I do get that you also include reading things on the Internet, but that's not always engaging enough to create a spark for people.
This is bordering on ridiculous. No, not only affluent people had role models FFS. Carl Sagan, for instance, was a 1st gen son of poor immigrants. His mother was a house-wife, his father a garment worker. His inspiration came from what scientifically curious people used to do before the internet - like going to the library, talking to his teachers, or even going to a museum every once in a while.
Since the advent of the internet the entire developed world has been getting literally dumber, so far as IQ can measure. [1] That's, to my knowledge, the latest study but a quick search for 'reversal of flynn effect' will turn up a zillion hits. In other words, what I'm saying is not controversial in the least. And one of the hypothesis for why this is happening (as per the linked paper) is, unsurprisingly, increased media exposure. YouTube is playing a significant role in literally making the world more stupid.
I love plenty of 'sciency' YouTubers - Veritassium, Cody's Lab, Smarter Every Day, and many more. But in reality, you're not like to learn much of anything from these sort of scientainment. It's just candy with a sciency coating, more likely to inspire people to want to make more candy, than to actually pursue science.
Same as everyone before YouTube. Role models and seeing/reading things.