All I can tell you is to continue trusting that a man has the power to forgive sins and we’ll see how that works out for you in a 1,000 years from now. In the meantime, you are free to believe what you want.
All I can tell you is that when Jesus says that he can give that power to a man, I believe it. The man doesn’t have the power, it comes from Jesus. Why would he give that power to a man if he didn’t want them to use it?
In the meantime, someday your church might actually be in existence for a thousand years!