What is commendable is that there are no losers, the love between David and Diana and John's love for Diana are sincere. As a billionaire, John did not use money as an arrogant tool to overwhelm love, but cleverly used it as rose and red wine for love, and devoted his sincerity to impress Diana.
In the end, John saw her steadfastness in Diana's eyes, and realized that he could not fully get her heart and her love, so he slandered his image in Diana's heart with a lie, in exchange for the end of a relationship. His voluntary giving up is graceful and gentlemanly, only related to love and personality, not money.
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