I personally hold onto beliefs until they are proven to be untrue. Perfect example is the State. I grew up believing the State is there to serve me. It wasn't until many years after my schooling that I started to question this belief. It would serve me well to still believe this in order to remain within my social circles, but I had to let it go. The evidence is just too overwhelming. This path doesn't feel beautiful, but seeking the truth is just too addictive.
Discussion
I would say that believing that the state operates in your best interest can cause you a lot of pain. That continuing to maintain that belief is not in your best interest & should be dropped.
To me, the accuracy of the belief is not as important as the danger or benefit in maintaining it.
Example: I believe that seed oils are toxic & take action accordingly. The outcome is that I sometimes I go hungry for lack of alternative food options. I would struggle to defend this belief as factual but there's enough logical & anecdotal evidence to justify me maintaining this belief.
Accuracy & correctness is important to me but I also believe (foundationally) that facts are just widely accepted opinions. This belief helps me to see things more subjectively. To challenge that which is unchallengeable.
I know that this caused a cascade of turmoil in my life when i adopted it. No regrets, but I also know that widespread subjectivity of everything isn't for everyone. When I communicate, I make allowances to get my intentions & meaning across.