Both 'dumb' and 'interesting' AI can be useful in a game, it all depends on your game's design.
To give another silly example: Tetris by default has very 'dumb' AI that just gives you pieces at random. You could imagine variants of Tetris with more interesting piece selection.
For example, an AI that makes pieces as unhelpful as possible while keeping their distribution statistically indistinguishable from true random selection.
Or there was an inversion of the 2048 game, where an AI plays the normal game, and your task is to give them unhelpful numbers.
Both 'dumb' and 'interesting' AI can be useful in a game, it all depends on your game's design.
To give another silly example: Tetris by default has very 'dumb' AI that just gives you pieces at random. You could imagine variants of Tetris with more interesting piece selection.
For example, an AI that makes pieces as unhelpful as possible while keeping their distribution statistically indistinguishable from true random selection.
Or there was an inversion of the 2048 game, where an AI plays the normal game, and your task is to give them unhelpful numbers.