pretty confident my stance is going to be the minority, but i'll give it anyway.
i've copied people's work. my butterfly garden and outdoor gardening space are almost item-for-item replicas of decor i've seen posted on instagram. pretty much everything else on my island is 100% my own work, apart from my park which was inspired by multiple different versions i've seen. my island is for my eyes only. my DA isn't posted anywhere, i rarely have visitors other than my girlfriend and sister, and i don't post pictures of it online. i'm certainly not going around claiming those areas were my ideas, and if i was posting photos, it either a) wouldn't be of those areas or b) i would mention that they were originally created by x user.
i still had to make those areas from scratch too. yeah, i had a reference, but i still had to find the materials, craft the items and put it all together. there was some real work involved. it wasn't akin to how people will copy/paste whole fics with a couple of mouse clicks and post them cross-platform under the guise of being their own. honestly, i don't see it being much different from sharing your outfit designs and people wearing those. since the original creator's code/name isn't displayed for all to see when you're wearing their design, there's no real way (that i know of) to know who made the outfit without either recognizing it or being told. (do correct me if i'm wrong though.)
at the end of the day, i've copied someone's work, and i wouldn't care if someone copied mine either. if anything, i'd take it as a compliment because they saw my crappy little build and it made them happy enough that they wanted a version in their town. i've gotten a lot better at filling up space and decorating on my own now (i just don't enjoy it lol, and i still look at other people's creations for inspiration) but i still like those areas. i don't want to take them down. i'm here to just chill and play the game, not agonize over an aspect of it (decorating) i don't particularly enjoy just to have a pretty island. i feel no different about my butterfly garden (copied) compared to my stonehenge area ('original'). neither one feels more earned/worthy than the other, and they're both pretty for me to look at when i play the game.