Is it really a shortage, rather than unfair order fulfillment, when it's just four companies buying up everything? There's plenty of RAM, it's just getting sold

Is it really a shortage, rather than unfair order fulfillment, when it's just four companies buying up everything? There's plenty of RAM, it's just getting sold to the people who yell the loudest instead of going "sorry we have more customers than just you" and fulfilling orders to everyone.