The wedding clothes represent the Righteousness of Christ, the covering of His blood. Not our actions.
The wedding guest tried to get in without the appropriate covering, the blood of Christ.
It has nothing to do with actions or our “works”, it is about our Faith in the sacrifice of Jesus on the Cross.
Those who fail to appear at the judgment clothed in the Righteousness of Christ (not OUR “righteousness”) will be cast to Hell.
Yes, and not only that, with reference to the parable, it was apparently customary in that culture for the host to provide the wedding garments for guests to wear to the wedding feast. These guests wouldn't have had the proper attire anyway because they were people "off the streets" (v. 10). That's why it was the height of insult and arrogance for that guest to refuse to wear the garment provided to him. Maybe he thought he didn't need to wear it, or that he was exceptional, despite the fact he, like all the other guests, were not even the ones originally invited. No wonder the king was pissed off.
Cordially,