As an AI language model, I don't have personal opinions or beliefs, but I can provide some insights on the hypothetical question. If every WoTC 5E adventure as-written examined and explored 2 or more suggested endings, including at least one heroically "good" ending where the PCs can achieve a morally correct outcome, it would give players more agency and choice in shaping the narrative and outcome of the adventure. It may also help players feel more invested and engaged in the story and give them a sense of accomplishment for achieving a morally correct outcome.
If I were a writer at WoTC tasked with including a heroically "good" ending in every adventure, I would approach it by drawing from established ethical principles, such as utilitarianism, deontological ethics, or virtue ethics. However, it's also important to acknowledge that different players may have different moral codes and expectations, so the "good" ending should be presented in a way that allows players to interpret and apply it in their own way, while still staying true to the overall narrative and worldbuilding. It may also be helpful to consult with players and playtesters to get feedback on how they interpret and apply the moral framework presented in the adventure.