No. It's always been about power efficiency. Apple's GPU are very good in that area just like the CPU.

https://arxiv.org/html/2502.05317v1

Apple vs. Oranges: Evaluating the Apple Silicon M-Series SoCs for HPC Performance and Efficiency

"Apple's M-series GPUs offer massive performance-per-watt, scaling efficiently from roughly 5W in base chips to around 40-50W in top-tier Max chips. This efficiency generally sits between 200 and 250 GFLOPS per Watt."

Sure. nVidia GPUs have higher performance. But they do it with 450W+ a.k.a. 10x the power