لا يترك العمل به باعتبار أنه عقد مالي
One does not abandon the established ruling of a specific text merely because the transaction resembles a financial contract.
Two different propositions are under discussion:
First: mahr is a right associated with marriage.
Second: its minimum is fixed or left to valid contractual agreement.
If a school holds the specified minimum to be established by the relevant evidence, comparison to other financial contracts cannot simply annul it. Another school may dispute whether that fixed minimum has been established at all.
The broader point is to establish the claimed specific ruling and its evidence before evaluating analogy or contractual resemblance.