Throwing out part of the OT is a formal denunciation of any doctrine that claims to rely exclusively on Scripture so such folks are doomed to following Eve rather than Christ sooner or later anyway. It's just a matter time until they run across a portion of Scripture they choose to ignore or reinterpret to suit their Self.
The fact that for over four hundred years, contraception was regarded as a sin by Protestants one and is the perfect example. Glands dictated a change in how Scripture was interpreted so a new interpretation was adopted.
Apparently working out anything with fear and trembling doesn't apply to those who have the "Christian Liberty" to properly massage specific glands.
LOL