What was the primary concern leading to Whitney's divorce request?

The primary concern leading to Whitney's divorce request centers around a health incident caused by food sold. This suggests that a serious issue arose from the management of the business that had direct implications for personal health and safety, indicating a critical level of distress and urgency in the situation. Such an incident could fundamentally undermine trust and safety in the relationship, prompting Whitney to reassess her marriage. Health issues, particularly those stemming from a spouse's business, can deeply impact both the emotional and practical aspects of a relationship, making this the most significant factor in her decision to seek a divorce.