Earlier quoted context omitted.
I don't understand the distinction you are making. If you have a massive excess of demand ready to pay any price, and a limited supply, of course the sellers will take advantage, that's how any market works. They can do that because of the lack of supply. Over the long term demand will rationalise and supply will adjust. But in between there is a squeeze, and the right price is the maximum price buyers are willing to…
In an absolutely free market? sure. But we don't live in an absolutely free market, the memory manufacturers have refused to budge on creating new fabs until recently out of caution and to be able to create a demand excess. They have slow rolled rollouts and everything, if there wasn't CXMT they would probably still wouldn't have budged on building new fabs for a while longer. You can absolutely price fix/manufacture…
...that's how the market works. This is called capital discipline and is standard across industries. If the increase in demand is temporary, they would be spending 5-10 years of profit on facilities which will only lose money. The same works in non-capitalist economies too, you don't want to waste resources on stranded assets and many still believe this RAM demand is temporary and the house of cards will collapse.