Maybe knowledge of Hungarian is a requirement for obtaining Hungarian citizenship - whereas being of Hungarian heritage makes you applicable for residency in Hungary, but not for automatic citizenship.
Just a guess…
Learning Hungarian isn't as difficult as is commonly believed.
Of course, it isn't an Indo-European language (like Farsi, Sanskrit, Spanish, English, or Old Icelandic), and it's agglutinative rather than analytic - so you won't have more difficulty than learning, say, Mongolian, Japanese, or Navaho.
Good luck!
Regards,