goal of Truth = working backward from what a goal should be, justification
goal of creative play = working forward toward space for living
While there is nothing wrong with a joy, or play, or creativity, what you're really doing here is excusing yourself from objective reality and rationalizing something that ultimately leads to solipsism, under the rubric of "creative play".
Truth exists and permeates reality. We are in that reality, which is a place of consistency, both from a metaphysical and physical perspective. Anything based on untruth, or unreality is basically a broken, ugly, dysfunctional joke - not "playfully creative".