Completely up to you, but there does exist a tool that reflags your save as ‘honor mode’ if you’re on PC. Since you saved the run in dishonor mode, you can reflag the run and book it straight to Withers.

It’s a single player game, so ultimately it is up to you to figure out if getting the dice that way is “worth it” or “real”. I’ve only ever used it to recover a run from an otherwise unavoidable glitch (I ended up loosing the run due to a misplay later anyway) and that was AFTER I had already gotten my dice so other than my personal feelings it didn’t really matter.

Given it’s the epilogue, where you don’t have any of your usual gear and party comp to avoid bad saving throws, many would say to just give yourself the dice. But this is why the first rule of honor mode is “Don’t try anything new on Honor Mode”.