Snowy Hydro 2.0 was something he backed heavily whilst in power. He has also invested and advocate considerably in renewables since leaving politics. Compare that to your regular run of the mill politician like Gladys or Baird swanning into telcos and banking, or the others jumping into gambling industries.
Also, why are you downplaying him talking about climate change? It's one of his best assets, he holds huge influence. Would you prefer he install solar panels? Get real. You just want someone to hate but are completely misguided.
Getting the user to use their app is pretty important. You may only be using TOTP now, but it allows for more intelligent multi factor authentication later on.
E.g. the app could check your risk profile, like where you're accessing from and if any impossible travel took place. They may add multi step auth like push notifications or biometrics.
By letting customers use Google authenticator you are limiting MFA to only TOTP. MFA isn't just an on and off switch anymore.