No one is trying to offend you. Those of us who work closely with animals in rescue, or vets offices, etc have seen lots of injuries from common household items that the owners weren’t aware of, even if to you it seems like it would be common sense. So, we would rather offer advice that may not be needed, than have an animal perhaps be injured – you would be surprised how many things people can overlook. I know one person who let their bird sit on their shoulder when cooking, never thinking “hey, you know, that pan is hot, maybe not a good idea” and her bird ended up with bad burns when he jumped off. Vets see people who recline on their animals come in all the time (well, more often than they would like), not thinking about all the moving parts under the chair. It isn’t meant to offend, merely to point out something some people may not be aware of.
And I did offer my idea on keeping him out from under as well. All my furniture is lined in very light, thin wood and in some places covered up by fabric so it doesn’t show. It works well.
Takes a little work to find fabric to match sometimes though… especially if the pattern isn’t just a solid color. Powder ripped up my beds box springs before I realized he had a liking for the stuff they line furniture with. lol