I don't. Contracts need to be, as they are, subject to the rules of the state. Unconscionable contracts must be voidable simply because not all contracts are entered into after arms-length negotiations. Breach of contract must be a serious issue, for which you must have a darn good reason.
Actually, Contract is Antecedent and Predent to the State.
(Please advance a Theory of Governance which does not recognize the Theory of Contract as Antecedent).
Unconscionable contracts must be voidable simply because not all contracts are entered into after arms-length negotiations.
If you're referring to "youths", "incompetents", "invalids", and etc., you're arguing Hard Cases against Principle. Hard Cases make Bad Law.
Start at the Beginning. (Please advance a Theory of Governance which does not recognize the Theory of Contract as Antecedent)
Best, OP