I forget where I read it. But the “luck” decreases over time and by the time a player is level 1k they are getting almost zero assistance.
The AI is told not to be predictable. So once in a while (for end gamers) it’s going to be told to do a “dumb” move that the player wasn’t expecting. That of course is scaled to whatever mode you’re playing in.
To the answer the OP though. Yes the difficulty in the game scales. Which is common for most video games.