Oh, I’m not feeling attacked - I just think you need to put your effort into making a PR or writing a guide.
I didn’t leave out any code, you just need to set an environment variable.
Not every install is the same, it depends on the upgrade path that was taken. The script has probably never been used on a fresh install 
And most forums that the script was written on, had plugins and mods and bugs that did odd things to the database.
It might feel “crazy”, but maybe you need to see the glass as almost full instead of a bit empty. The script gives you 99%. So yeah, it might need some extra effort to make it 100% perfect for you. But it’s working and not broken. It did not need modifications on the last few imports I did with it.