And a big driver of that seems to be that either the debate isn't about facts so nobody cares, or frequently that the experts don't have a well advertised an opinion on an important subject. It really turns up in economics where finding facts is a challenge. The biggest economic miracle of our time is China's industrial policy and it isn't particularly obvious what the facts about that are.
I'm sure that there are economists who are devoting their lives to figuring out what happened in China because it is an interesting and important topic. But where the facts are being surfaced is not obvious and it isn't going to make its way through the broader public discourse.
TLDR; finding any facts in any public discussion is actually a bit of a challenge. It tends to be opinion all the way down until the trail goes cold.