wat? What kind of argument is this?
She is a teacher, so yes, she does talk, but she does more than talk, she's not some overblown windbag, she built the sith Triumverate, put two of the most powerful perversions of nature under her command and when they overthrew her, as all Sith do, she humbled them right back down with the crew of a small stock freighter. She used every bit of power available to her but not without reason, she did not wantonly drain planets like Nihilus which ultimately was HIS downfall. She did not just wantonly sever every force-user from the force, that would give up her abilities of discression and deception.
Sorry but she didn't build the Sith Triumverate. Darth Revan built it.