From discussion I have seen, the reason for not providing an official way to print the certificates is that the whole system relies on the server (URL) verification of the certification.
That is, it is expected Campers will share the certificate by sharing a URL, and not by sharing a paper/printed copy.
Also, the certificates are largely nothing more than exciting checkpoints for representing progress in the curriculum. That is, they are not accredited, and provide no authentication as to a Camper’s development know-how. They are easy to manufacture, and easy to cheat. This is not a problem, because they serve little purpose outside of personal confirmation as to progress.
I do not mean to disappoint or discourage any drive to finish a section of the curriculum, and claim a certificate; the certificates are exciting to get, and, rightly, provide a positive reward for those trying. However, it is important to remember that getting one or more of them is in no way related to being a sure-fire way to get that job you always wanted.
In summary: Easy fix? Probably. Is there a hard “no, this will never happen”? Not that I have seen. Do I download/print my certificates? No, because what would I do with them. So, if someone so desires to do so, they can, albeit in not the most expected way.
Rant over Just my understanding and opinion.