save scumming is ok in a singleplayer game, entering dice values is silly.
The only difference between the two is sitting through load times vs. not. Given some players definitely are going to savescum until they pass RNG checks, I don’t know why you wouldn’t give them the option to avoid wasting their time watching load screens.
Again, all I’m suggesting is an optional setting, like trivially easy combat will -quite rightly- be a setting for people who want it. Nobody would be forced to use it who doesn’t want to.