Is there a way to slow down the player's turn speed?

I would like the have the player perform a slower turn than the usual default turn for better control at higher speeds.
https://gyazo.com/a90d8eb6931b670f7c73486bf1242943

In one of my test games, I’ve done this before by manually setting the player’s rotation while they hold down the button to move, the only problem that arises is the default controls from Roblox’s built-in control scripts, but you can clone them and edit them as you like. (And then publish the edits over the default ones.)
The easiest method would probably be to duplicate Roblox’s default control scripts and find the one that manages rotation when turning, or make your own custom movement script.

Why would you need better control at higher speeds, especially through this method? Slowing down the humanoid’s rotation has nothing to do with this for the most part.

Because of how the way the game, and levels will be overall designed.