Hideeho
Saucing the tires makes a difference in handling the same way the right tires do. If your set up sucks, sauce doesn't help. If you have the wrong tires, sauce doesn't help. If you wreck a lot, sauce doesn't help. If you have a good setup, the right tires, & will be a solid 2nd or 3rd place with only 1-2 bobbles in the a-main, sauce can help get you another position or 2.

I stated it doesn't help in certain situations, that is incorrect. It does help, but it does not come close to making up for something lacking in another area.