Oh, I wanted to add: one thing laypeople can do is a be a conduit for info from others. There’s a lot of technical knowledge I don’t have, but I’ve read or watched presentations from people who do, and I can bring them into discussions with my fellow nerds. Being a good citer is itself a skill, or set of skills, one can develop with practice.
Also, there are often pieces of a complex subject that a layperson can take hold of and do something with. Like I did above with “Emily Wilson doesn’t just use ‘slave’. As Lady of the Library pointed out in her response to Metatron on YouTube, in chapters 1, 15, and 19, Wilson does use it, but also the words for specific occupations and household positions of those in Penelope’s.household.” That’s something I can go look up and find that, sure enough, those words are all there. Those insisting Wilson only used ‘slave’ are objectively wrong in a way monolingual me can check.
Knowing what you are and aren’t qualified to say often - at least for me - opens up fairly significant fields where lay knowledge is valuable, without poaching on the turf where you own clues can never go frolic safely.