Because if they would be okay with it people would just cheat to clear the whole story in all modes, receive the max reward from outpost rewards and gain a huge adventage over people who don't cheat. Since Nikke is an idle game this adventage is too big to just overlook. If people would've just mindfully cheated without pushing it too hard or making it too obvious it could've went under the radar but some of the folks here were so blunt about it that it got alot of attention.