For example, 8 minutes per turn on a strategic map in the late game is clearly not enough. Even the best players don't have time to complete their turn if there's no buffer in the timer. And there are "thousands" of examples on streams.
If you set a reasonable turn timer, then an infinite timer isn't necessary.
And I think that in such a tournament, you could add a rule: "once per game, you can request a save rollback due to a stupid mistake." This refers to deleting an army on a stronghold. Or splitting up the main hero so that its speed is lower than that of ranged neutral units. This kind of thing. (if necessary, this is not about having two morale levels in a dungeon on seven units – the difference is that we're talking about an action that could never be beneficial depending on the random outcome – a clear mistake that ruins the game).