I wouldn't think of it like that. It's usually good to have unused CPU potential for a number of reasons. (background processes, future games, future GPU upgrades, etc.)
*If you already have the 1050 Ti, then the only reason you would want to get a lower cost CPU is if you were trying to upgrade your GPU and needed to save money.
But I'm concerned why your list has the Ryzen 5 1600 listed at $341? That's a $200-$210 USD processor.