Right. That is what is being discussed and what you've argued against. As I said it would be reasonable for Orcs, with no master, to not remain 100% hidden over 1,000+ years. You claimed it isn't reasonable to say that because Tolkien never wrote it. This is exactly what is being talked about and I'm not sure why you are confused after you've argued on the subject.
As for the show news has reached Numenor because of Galadrial meeting refugees and being rescued. It may be reasonable to assume they have heard reports of Orcs but are not interacting with Elves to pass that information along. Remember the show sets up that they have turned hostile towards elves in recent years. The elves are not omnipotent and the show hasn't shown that they had people watching port cities in the Southlands or actively patroling against Corsairs. There is an entire world of people out there that hasn't been under their thumb.
Lmao. Tolkien used change encounters all the time in order to shake the world. Bilbo finding the One Ring was a chance encounter. Sauron's army didn't move on Eregion in secret because his war started about 100 years after he revealed himself when creating/wearing the One Ring. Random Orc raiding parties also doesn't contradict Sauron regaining control of Orcs in secret. Remember Tolkien explicitly wrote that some Orc tribes ignored him because they didn't think Annatar was Sauron. Isn't it reasonable to think they might still have raiding parties and other "Daily life" things?If one random chance encounter is capable of shaking the world, then yes I would say it's not reasonably comparable to Tolkien's original depiction of a secret Orc army that was able to move on Eregion in secret.
It also ignores how Sauron was already corrupting the lands of Men "in secret" as well. Which the elves didn't notice over that 600 year or so period before the One Ring was forged. So even in Tolkien's work the Elves were not fully aware of everything happening. What we are seeing on the show is the tail end of Sauron's "hidden" phase. As I said since the Elves were unaware of port cities being attacked with Orcs or having refugees or even the Kingdom Halbrand cane from it is clear how Orcish activity could remain unseen.
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Okay lets try this one. Is it reasonable that Elves, Dwarves, Orcs, Humans, and what not have to use the bathroom? Tolkien never writes about it so according to you it isn't something that his creations are required to do. They are required to consume food and drink but to never excrete waste. So if it is reasonable to assume they do that stuff isn't it reasonable to assume Orcs might raid and pillage? At least with Dwarves who inhabited the same mountain ranges as them? Wouldn't it be reasonable that over 1,000+ years Elves would know Orcs existed but without a master?
Though I've seen it said that Galadriel didn't give Sam a jar of dirt but a jar of her own poop. As the elves diet would make for excellent fertilizer. Lol.