This is perfectly in line with the definition of epistemic rationality, that is, building an accurate map of reality regardless of the pleasantness of the 'reality landscape' that needs to be mapped.
That may well be, but in my experience people whose ideal is seeking for "Truth" often have a tendency to reject truths that don't match their other ideals. Or, on the flip side, they acknowledge the truths but become bitter and cynical because actually acting upon those truths would violate their other ideals.
In other words, merely knowing the truth is not enough. It is accepting the truth -- and acting on it -- that is required.
(Subject, of course, to the usual caveat that instrumental rationalists do not require "the" truth, only usable models. Winning rationalists use whatever models produce results, no matter how ludicrous they sound or obviously "untruthful" they are.)
It's not clear to me whether you mean that accepting models that "produce results" means you'll arrive at actually true model, or that you think winners are willing to use obviously false approximations, or that you think winners believe falsely in order to win.
This has been discussed some, but I don't think it's been the sole subject of a top-level post. I want to find out other people's ideas rather than driving the discussion into my ideas, so I'm asking the question in a very general form, and holding off on my own answers: