The experience described in the "Checkout" story by Cynthia Rylant appears to be a necessary outcome rather than a missed opportunity. The story depicts a brief encounter between a cashier and a customer, where the cashier's kindness and empathy towards the customer's financial struggles leave a lasting impact on both of them. The story highlights the importance of human connection and compassion in everyday interactions, and the significance of small acts of kindness. The story portrays the necessity of empathy and understanding in our daily lives.