Derech–if one’s lack of insight causes pain to others on a regular basis he is 100% a mayzid,because he must see that he is provoking other’s anger,hurt,tears,negative reactions….he must seek guidance so as not to be oiver the countless issurim he is being oiver with his seeming (consistent)”lack of insight”.
If a guy rammed his Suburban into you,and then claimed it was due to a lack of eyeglasses,would you buy that??.