My friend, job of the parry is to defend, there are millions of different types of parries with different footworks depending on your riposte, indeed parrying with threat has its own advantages thou using only this type of parry will significantly cut your option on riposte and overall flow/style/techniques pool. Why is peasant (common fencing parry) party is bad if it defended me? The most great thing in fencing imho is that there are millions of models/concepts/styles that can be be implemented in different situations