I think there quite some value in having sacred beliefs if you can demostrate to other people that those beliefs are sacred.

Take a politician who thinks that solar subsidies are a good thing and who pushes for a law to that effect. Then a company manufactoring solar cells offers to give him 10,000$ without any strings attached. 10,000$ are utility for the politician and the politician shouldn't just accept the money and put it into his own pocket, even if he can do it in a way where nobody will notice.

There value in the politician following a decision framework where he precommits against accepting certain kind of utility. From a TDT perspective that might be the correct strategy.