Whether venial sins are suitably designated as "wood, hay, and stubble"?

Objections

Objection 1 : It would seem that venial sins are unsuitably designated as "wood," "hay," and "stubble." Because wood hay and stubble are said (1 Cor. 3:12) to be built on a spiritual foundation. Now venial sins are something outside a spiritual foundation, even as false opinions are outside the pale of science. Therefore, venial sins are not suitably designated as wood, hay and stubble.
Objection 2 : Further, he who builds wood, hay and stubble, "shall be saved yet so as by fire" (1 Cor. 3:15). But sometimes the man who commits a venial sin, will not be saved, even by fire, e.g. when a man dies in mortal sin to which venial sins are attached. Therefore, venial sins are unsuitably designated by wood, hay, and stubble.
Objection 3 : Further, according to the Apostle (1 Cor. 3:12) those who build "gold, silver, precious stones," i.e. love of God and our neighbor, and good works, are others from those who build wood, hay, and stubble. But those even who love God and their neighbor, and do good works, commit venial sins: for it is written (1 Jn. 1:8): "If we say that we have no sin, we deceive ourselves." Therefore venial sins are not suitably designated by these three.
Objection 4 : Further, there are many more than three differences and degrees of venial sins. Therefore they are unsuitably comprised under these three.