What's the point of reporting cheating if SE doesn't even look into it?

[Dustytome]

When suspending or banning accounts there is a lot of investigations that need to have something called concrete proof to prevent law suits.

Lawsuits from what? The ToS specifically states:

SQUARE ENIX MAY SUSPEND, TERMINATE, MODIFY, OR DELETE FFXIV SERVICE ACCOUNTS, CHARACTERS, VIRTUAL GOODS, OR THE SERVICE ALTOGETHER, AT ANY TIME FOR ANY REASON OR FOR NO REASON, WITH OR WITHOUT NOTICE OR LIABILITY TO YOU.