We live in the real world. If you don’t submit the government forms how they want you to, they shrug and fine the shit out of you.
Then you just don’t know the law. There is no legislation that enforces Acrobat in any civilized country without alternative.
Quite the opposite: Send macroridden documents to any decently secure infrastructure and you get a big fat warning in the subject if it’s not filtered entirely. Officials LOVE to do that extra call ensuring that this document is really from you before opening it and no phishing attempt…not.
Source: working >25 years in IT, >15 years for government IT
EDIT: we got some real Adobe Acrobat Fanboy here, eh? ;-)