Quick math:Yeah light wheels being a performance advantage due to inertia and unsprung weight is one of those true things that is often vastly overstated
4,000 lb car @ 70 MPH: 888,000 joules
1 lb @ 70 MPH, 17" diameter: 182 joules
Yeah, so each pound you take off is 730 joules at 70 MPH, out of 888,000. 0.09%.
GRM added 12 POUNDS per corner to a MIATA and changed lap times by 0.31 seconds. No magic expensive forged wheel is going to save you 12 lbs vs any other reasonable wheel.