ST is far more important for the majority of the target audience of these mainstream CPU's. Not running at 94C with great cooling is also a highly desirable goal. The 12900k is cheaper than the 5950X and 7950X remember...
For professional users that require workstation class CPU with higher core counts, support for ECC memory etc, Threadripper/EPYC are far more suitable and are better than any workstation CPU and Intel can field.
5800x3d is poor in these and look how it does for gaming so yeah