You literally typed, "there is no way you are doing anything above 8+ with chain heal being your main source of AoE healing...," proving your lack of understanding regarding mythic dungeons and their requirements. This was not you exaggerating; it was displaying your ignorance.
There was a time where pretty much everyone ran torrent in raids, until top players finally realized Undulation/UL were better in every scenario, so you saw a shift in talents.
I don't log dungeons, but I know what I'm talking about when it comes to resto shaman.
https://www.warcraftlogs.com/ranking...10/#metric=hps - Feel free to check those orange HPS parses and see how much DPS I was doing simultaneously. Shall we compare to your own logs?