It's not like this is merely an argument that has no consequences. Christ speaks dire consequences concerning this truth.
So what if I have sin in my life at this moment? So what if I wait just a while longer to repent?
Jesus is glad (for your sake) you asked that question. He wants you to understand something.
Rev 3:19-20
19As many as I love, I rebuke and chasten: be zealous therefore, and repent. 20Behold, I stand at the door, and knock: if any man hear my voice, and open the door, I will come in to him, and will sup with him, and he with me.
If any of us have sin in our life at this moment we should be very afraid. If indeed you belong to Jesus Christ judgement is coming your way! For whatever reason one has sinned and then has not repented of it this is Jesus way of trying to open your eyes.
Think of it. If one sins everyday and Jesus loves them, he may chasten them every day. In what way?
WHO WANTS TO FIND OUT! Not me.
And yet this is a promise from him. If he loves you he will chasten you.
You may try to brush it off and say, No that could not be the Lord doing this to me. But what if it is? If sin is in our life is that not an open door? How long must Jesus wait before he chastens one for sin? A long time? Maybe.
But thinking about Anannias and Saphira maybe not. It could come very quickly. Will it be as a "nudge" or will it be harsh and grievous? After all Paul said this:
Heb 12:6
6For whom the Lord loveth he chasteneth, and
scourgeth every son whom he receiveth.
He scourges?
OUCH!
So we see that even the first level of allowing sin in our lives can turn into something quite painful. Yes it looks like there might just be real consequences if we are not diligent to be obedient to our Lord.