Earlier quoted context omitted.
You've always been able to change AirDrop to contacts only. This "feature" just makes it harder to send AirDrops to people who want to receive them.
Assuming that anyone with airdrop set to everyone wants to receive your files is just wrong
Also, it's not like they just receive the file without consent, last I used an iPhone there was a popup allowing the other user to accept/decline the file.
So it's less like "anyone with airdop set to everyone wants to receive your file" and more like "anyone with airdop set to everyone wants to be asked if they want to receive your file".