The damage of the former is entirely contained to the act of producing the floppy disk. It sucks for each business when they have to make the 1 floppy disk but then the damage is done. With the USB mandate, the party producing the millions of devices is constrained going back to the design of their core product and then every person using it is constrained.
No one is enforcing the use of old-school fax machines, for example - businesses just have been reluctant to give it up.
This is fake news /s
The law of the land is manufacturers all have to agree on a standard.
If Apple wants to bribe everyone to use lightning, or micro-usb, they are free to do so.
If tomorrow everyone wakes up and decides to use thunderbolt, they are free to do so.
[1] https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=uriserv%...