Is there not a contradiction between the statement that fulfilling a promise is not obligatory unless it is an oath, and the religious texts that urge the fulfillment of covenants and consider breaking them to be a characteristic of hypocrisy?

In previous fatwas, we discussed the scholarly disagreement regarding the obligation of fulfilling a promise. The majority of scholars say it is recommended (mustahabb), while some jurists view it as obligatory (wajib). Those who consider it obligatory cite the hadith about practical hypocrisy and some verses and texts that sternly warn against betrayal. Some scholars differentiate between one who intended to fulfill the promise but was unable to, and one who made a promise with the intention of breaking it. A group of verifiers (muhaqqiqeen) considers it obligatory where the promisee entered into a commitment because of it, such as someone who promised to assist with the dowry.