My theory is that this is why most enterprise software is terribly slow and buggy with horrible UX. If something works, and there is a completely coherent logic

My theory is that this is why most enterprise software is terribly slow and buggy with horrible UX. If something works, and there is a completely coherent logically consistent system buried in the mess, people can and will usually figure things out. And the drive to make more features generally wins out over time above addressing technical/UX debt.