This reminds me a bit of the complaint a irl friend of mine had about D&D in general; he despised the dice. He hated the chance element they represented. As he saw it, you could should either succeed or fail based on their ability and skill without chance being a factor. Never could get him to play outside of chargen.

5e is designed to always present a challenge regardless of level, so that fail chance is almost certainly intentional. You can't just auto-win.