The cost of PV is not a red herring in that the consumer cost is the culmination of all manufacturing efforts required to make PV including profits for everyone. Because of this you can’t claim there are hidden supply chain problems with PV panels without providing any evidence.
I already addressed your, “research it yourself” deflection.
This is faith for you.
Here is an essay https://thehonestsorcerer.substack.com/p/solar-panels-another-exercise-in I have come across covering things I thought you could find relatively easily on your own. If you’re motivated you can fact-check and use it as a point of departure for further reseach. If you’re really motivated I can recommend Tim Murphy’s textbook https://escholarship.org/uc/item/9js5291m
I could provide proof that your links have mistakes but you should do your own research. I think you can find them relatively easily on your own.
To get you started, compare these numbers which are sourced against your textbook.