Ah, ok. Must have been an internet misunderstanding.
Unfortunately, you're going to find that customizing anything Apple is going to be an annoyance. Those who enjoy it most tend to not care about tweaking/like it the way it is. I think we all have things we don't like, but we tend to just wait it out.
A lot of people complain about Apple's lack of customizability (overall not just in one instance like this). Those people aren't Apple's target market. Apple's market is for people who'd rather leave it the way it is and get something done.
I like customization as much as the next guy, but for some reason, I find that Apple and good developers offer just enough for me. I don't customize UI and things like that because that leads to instability but I do wish that I could get rid of that stupid linen texture.
Man that was a long sentence.

Anyway, if you don't use aliases much you might be able to figure out how to just hide the arrows. This has the added benefit of not being overwritten when you update the system.
One, it's easier to
sudo su first before doing anything. This will ask for the password, but basically log you in as root. Then do everything so you don't have to keep entering sudo and possibly passwords (for some reason sudo su is no longer asking me for a password after using it and exiting out of a terminal session properly). Anyway, then make sure to
exit from root and exit to end your process properly.
Two, this is probably going to get screwed when you update things/update the OS.
Oh I don't disagree. She just doesn't sound like a non-power user. Personally I don't use it. I dislike it not because I don't know what's going on, but because it bothers be that spotlight doesn't clear the search after finding anything. I don't use it for documents either, because normally I'm looking for the file itself and the folder it's in, not to open it. Perhaps there's a key command for "show in finder" that I'm not aware of, like command+enter.