Can mean different things, we know Rabcat probably made some of the models so what if those can't be edited because they are in effect complete. Or how about if all the assets and such for the game have been locked so they can't be altered. Technical Difficulty just means something technical is stopping it from happening at the moment. Sort of like that area in TDU with the long stretch of road that just pops up that couldn't be fixed due to the way the game engine would have to in some parts be rewritten or the like. It can be a small thing that could be fixed later or it could be a massive operation requiring much more attention and time than what it's worth.
I didn't say damaged bumpers, I said he removed the bumpers. The area behind them was modelled also, not just plain black like other games might and have had. So don't go doubting or trying to disregard what I say because believe me I wouldn't say things like that without knowing about it first.