It's a case of a rationalized antinomianism leading to a lighter softer legalism that says:
"Hey look at us, no one goes to confession anymore, they don't need it, look how holy we are. Lifeteen has made my children saints. The new Springtime has finally come! Sin no longer exists and we don't believe in it either!"
Of-course it never did dawn on these "good" NO folks, that if you actually want to avoid mortal sin, grow in holiness, and get to heaven without spending time in purgatory, it's a good idea to confess venial sins which many of us "over-scrupulous" Trads do.