By your logic type PD spec is stupid because it is also used in PC. The use cases extend beyond PC. Think video wall system where cabling can be messy and pretty much everyone got their own standard. This would allow a single daisy chain and simpler cabling.

Bigger power delivery spec. The hope is that it should be possible to drive a huge display from a single cable for data and power

It makes it to the news before. The HDMI forum is understandably upset by that