What? You can go out & buy whatever RAM you want. It just requires willingness to pay more than Nvidia & friends. That's how markets are supposed to work.

Manyfacturers aren't artificially restricting supply, they're running fabs full-tilt. You could want them to build more fabs to meet demand. Which they are, but at a more modest rate than what you would want, because those manufacturers have been burned in previous boom-bust cycles. Never mind that fab-construction lead times are measured in years.

And what's stopping you from fabricating & selling RAM? I've read it's very profitable! Oh yeah, it takes many $B to pull a SOTA fab out of the ground.

Vendors price-gouging? Probably. Wouldn't you?

TLDR; it's not a monopoly issue. This is a high-tech specialized market where a ridiculous spike in demand is near-impossible to cater for. You want some new RAM-heavy gadgets? Shell out $, adjust your RAM 'wants', or be patient.