Two counterarguments to your realization:

1. According to Anandtech [1], Intel is appealing to enthousiasts/gamers:

To go with the launch is a new look of Intel's Core processor packaging, in part to appeal to the gaming crowd. As the gaming industry is considered one of the few remaining areas for potentially large growth in the PC industry, Intel is increasing its focus on gaming as a result.

2. The Skylake-K processors launched today are the unlocked versions geared towards overclocking, again targeting enthousiasts. Skylake-S won't be out until later this year.

This makes it all the more perplexing that they decided to ``use so much die space'' for integrated graphics given their target audience.

[1] http://www.anandtech.com/show/9483/intel-skylake-review-6700...