https://en.wikipedia.org/wiki/Field_of_Dreams

The quote is from a ghostly, disembodied voice which encourages the protagonist to rip out their farm's corn crops and build a useless, pointless baseball field, in the middle of nowhere, so that the ghosts of dead players can come back to entertain people. The farm and the family are in financial trouble, and the bank wants to foreclose on the land, and so what has he got to lose?

The film has a happy ending, of course: the guy builds the field, and all the ghosts come, and the human fans come as well, and his new baseball field is a rousing financial success. Our protagonist has honored his father, a lifelong baseball fan, and he's provided for his family, in the most unlikely of business ventures, counseled by voices of the undead.

It seems weirdly missing the point to apply this to any real-world situations. You are essentially invoking a weird ghost story of baseball and utterly implausible fiction. This is not business advice, this is superstition. Field of Dreams protagonist in real life would've been hauled before a psychiatrist and medicated, and promptly served divorce papers along with the foreclosure.