Blindly following rules is a fools errand.

傻瓜才会盲目遵从规则。

youdao

Others plays tricks on them and called them "April fools," They sent them on a "fool's errand" or tried to make them believe that something false was true.

其他人便捉弄他们，叫他们“四月愚人”，骗他们去跑腿或试图让他们对某种假的事情信以为真。

youdao

Those that believe they can execute their ideas without a trusted team are on a fools errand and will quickly discover that failure is their only option.

FORBES: Co-Founder Conflict Will Happen. What Will You Do?