I wish that were the case, my multiple experiences are quite different. its not that the software doesn't work - but the software doesn't actually capture the process, or properly talk with other systems, or isn't set up for a new business model or product line...then you have layers and layers of "tools" created to make it work, and a bunch of people using spreadsheets and csv files to do workarounds, and then the guy that wrote a bunch of the tool's 10 years ago leaves and there is no documentation or it needs to be re written in order to upgrade some other piece of the system.

i guess another way of saying this is that on the micro level a lot of this stuff is not rocket science, but at the macro level it becomes hugely complex.