It is an interesting point. As someone that really enjoys building I tend to lean quite heavily on the decorative and clutter items to create the home or space that I envisage. I also use a number of objects at a smaller or giant-size to fill in for content that I'd otherwise like to see available.
This does obviously create a lot of non-functional/redundant objects and I can see why that would frustrate a lot of other players. When I watch the "speed-builds" on YT I do get a bit frustrated with how much decorative content they include especially when it involves painstakingly encasing objects with panels and such to completely disguise them but leave them usable.
There tends to be a lot comments saying that the lot is unusable when downloaded and I know that there are sometimes innocent reasons for that but oftentimes it's just too busy and things break.
I've only recently begun using cheats to place objects where they don't snap or otherwise belong and I'm yet to have an issue to do with routing or generally using functional objects. Everything in moderation I guess.