It matters so that average people have a chance to own their means of production, and that the current hardware-grab by entrenched capital doesn't get to charge such high rent.
There are no privileged consumers that have "dedicated" amount of production, no matter the demand.
If someone can dump 100x the money to get something I want, they're not "just like me".
if I'm ordering 1 RAM and demanding some special customization, even mom-and-pop stores will just ignore me
but if I'm buying 100000000000 RAM, things change
You can own stock, but other than that?