I'm not sure why you're focusing on PUCT having “final say”. This Texas Tribune article shows ERCOT kept market prices too high for nearly two days after outages ended when their own market monitor said they should have reset prices the following day. It was clearly within ERCOT's control to fix.
https://www.texastribune.org/2021/03/04/ercot-texas-electric...
You keep editing your responses heavily, so it's hard for me to respond correctly. I assume the changes to your post mean that you have found this article: https://www.texastribune.org/2021/03/05/texas-ercot-electric...
I'm not sure how you decided what I'm "focused" on. Read the first two sentences of my previous post again.