When I was a child, I came across new words all the time, and learned to deal with them by either trying to find out what they meant or by waiting and hoping I'd be able to work it out from context. Logic suggests this is normal and ordinary and to be expected.
As I grew older, this happened less frequently, but the way is see it if the asymptote is zero then I must be doing something wrong.
I think there's a media bias in what they think warrants an explanation, simply as a result of the background expertise that people who work in the media consider to be normal. So they might throw 'gaslight' or 'subprime' around as if anyone who doesn't understand the term is an uncultured oaf, but provide a handy (if not entirely accurate) pop-out explanation of what a 'blockchain' is.
And of course this evolves over time as different subjects dominate current affairs, with the people in the media generally being at the front of the curve. So if you're late to the party (a week is a long time in politics), you miss the explanation of new terms.