It is very easy to organize Launchpad. Just drag the icons.
I didn't say that it was hard, but that it's annoying. If you have lots of apps, organising this will take forever and you know that it could be a lot easier. At best you reorganise a few apps and leave it at that. Doing more than that is a chore. That's not why we have powerful computers if we still need to resort to mundane manual tasks.
The OP is absolutely right.