Dungeons I like to go in not knowing anything, especially early on in patches. Primals and raids though, nope. No fun at all for me personally to go in blind, and I'd feel like a burden and just have zero enjoyment.
and I can't stand it when I'm asked to explain a primal ex fight or a raid :/ especially when someone demands a clear explanation. If someone is too lazy to look up something, they might as well expect me to be too lazy to explain that very same thing to them. So I just give a short summary and hope for the best.