Anything that connects to the network needs a synchronized clock with other devices it directly communicates with in order to make sure it’s not being subjected to timing attacks
Please explain what kind of timing attacks because what you wrote doesn’t make sense in the context of a damn printer.
Server? Sure. Printer? Why can it even access public internet?

Relevant Betty White skit:

Isn’t it a bit… selfish for you to expect everyone everywhere know your fucking context? 88 means shit nothing in Europe and we’ve got the original Nazis here (except of course if you’re Nazi - they know about 88, common people don’t).
Same with 666. Ask an Indian what it means and he will tell you one more than 665.
My challenge isn’t about NTP but about printer shouldn’t be able to communicate with the internet, as it has no need for it.
You said: It’s common.
Okay, cool. So is cancer.
Exactly! So why allow the printer to go past it!