In competitive games, other players are guaranteed to win. In single player and co-op games where you play against the system (or AI), victory is conditional. It's a bit like jumping high in a stadium alone: what is victory? If you jump higher than before, even if it's much lower than the world record, it would be enough for most people.
The great thing about tabletop games is that there isn't a computer that throws you off course with the "Game Over" screen. It is up to you to follow the suggested course of action when you reach a state of victory or defeat. But once you understand that the terms winning or losing are arbitrary, you can decide to change them up based on what you like best. Some people like to start over, while others like to keep playing.
I think over time I'll get better at paddling, getting past the first 'easy' level and moving on to intermediate and harder. But if I didn't improve and couldn't manage a certain level of difficulty, I wouldn't want to miss these last very difficult stages. Although I find it "very difficult" to follow the developers' arbitrary rules, I prefer to change the win/loss conditions and play difficult scenarios. I'm also planning to go to Spiel Essen 2021 in a week and maybe get an extension for Paleo. Getting harder DLCs for a game you haven't beaten would be foolish. but if for some reason the paleo expansion is too difficult, "hacking" the win condition is an obvious way to solve the problem.