Earlier quoted context omitted.
Well, you're linking TO something and not FROM something so target seems more accurate(they are essentially pointers). I'm honestly surprised about the help confusion though: ln --help Usage: ln [OPTION]... [-T] TARGET LINK_NAME (1st form)
That is the symlink target, not the ln target, which is exactly why the "target" nomenclature is confusing. Also note that not every "ln" has a "--help" or uses that help message as the output. For example, try on OS X `/bin/ln -h`.
For GNU ln at least I don't find it confusing at all particularly considering the only other option is LINK_NAME. I guess YMMV though and it seems kinda pointless to argue whether it is or is not confusing. Perhaps a poll could quantify it.