A vendor can still do something, even if the guild wouldn’t allow them to do it, if the guild didn’t have the power to stop them.
It used to be a guild vs a blacksmith (or the blacksmiths guild). Now it’s trillion dollar corps against smaller islands of un-organized individuals.
That’s new regardless of how you try to argue it.
> "Bwahaha. You’re really reaching there."
No. Customers have never been able to compel their suppliers to make or sell certain products against their will (except in collectivist regimes or like 0.00001% of natsec related instances)