Well are there different degrees of sin? There definitely are as far as the laws of man are concerned but what about God? Can just a thought that goes through your mind be sin?? I would say no but Jesus said if you even think about a woman thats not your wife in a lustful manner that its the same as actually doing the act. Thats a pretty tough standard to live up too. Practically impossible. I think thats why He said it that way, to show that no matter what we cannot live up to the standard He requires and without the blood of Jesus forgiving our sin we would all be toast.
So why would you hold another person to a standard that God doesn’t hold them to? Or that you don’t hold for yourself?
Edited to say: I did a bad job communicating what I was trying to say. The standard doesn’t change. But it seems like you are expecting a person to uphold that standard that you said Jesus himself was saying they couldn’t. Make sense? Clear as mud? 😂