That wouldn't be any better than what we have today. Too many just thinking they can do what they want, and that it will be OK. Oh, we might ask Jesus to forgive us the first couple of times, but we humans have a nifty way of justifying what we do, if we are not held accountable, and don't have to admit what we do to anyone here on earth. We could just slip into sinful ways, turn away from God and just keep on moving until we're so far away from Him, we don't hink we need Him at all.
That's the beauty of the confessional. It's just me and the priest, and he's not telling anyone. But I can tell him, and admit out loud in front of a witness, the sinful things I've done, and I know that God will forgive me. That keeps me on the straight and narrow, because I know I have to admit to someone else what I've done.
That makes absolutely no sense whatsoever. So if a person thinks doing 'X' is not wrong, then why on earth would they confess doing 'X' to their priest? If you have a 'right' conscience and a heart to do what God wants, you would have no problem confessing to Him, otherwise you're not. Think this thru... Have you ever confessed something to a priest that you didn't think your Heavenly Father knew about or didn't see???