Why are validation rules enforced only during lead conversion in specific circumstances?

Validation rules are enforced during lead conversion primarily when triggers for lead conversion are enabled. This means that Salesforce allows for a specific set of validation checks to run when converting leads to ensure data integrity and meet business requirements.

When lead conversion occurs, the validation rules can help verify that the necessary criteria are met before the lead can be successfully converted into an account, contact, or opportunity. By enabling these triggers, organizations can enforce data quality and ensure that all records maintain valid and complete data after the conversion process.

If there are no triggers enabled for lead conversion, then the validation rules would not be enforced during this process, which could lead to issues where inadequate or incorrect data is allowed into the system. Therefore, the enforcement of validation rules during lead conversion is directly tied to the configuration of these triggers, making it essential for maintaining a high standard of data accuracy in Salesforce.