Maybe I'm biased as someone living much further north, but it seems to me that Sweden and Finland have more strategic geographic importance than Hungary, at least as long as Ukraine doesn't fall completely (ie as long as Russia doesn't get a common border with Hungary).
Without a shared border with Russia, Hungary's usefulness in a conflict would be relatively limited for Russia. On the other hand, for it would be highly dangerous for Hungary to willingly align with Russia, as that would make it likely that a future conflict would be fought on their territory.
As long as Sweden and Finland remain neutral, they are at risk. Putin has shown that he is willing to use military force to grab land. Should he grab Finland and Sweden, he would effectively control the Baltic sea and also have bases that can reach Western Europe much more easily than he can at the moment.
On the other hand, with Finland in the alliance, Nato has a highly defensible (for Nato) shared front with Russia, in the case of a conflict.
Also, keep in mind that Finland + Sweden together has a greater population than Hungary as well as maybe 5x the GDP, and that while Hungary is moving towards totalitarianism, Sweden and Finland both have long democratic traditions, low corruption, etc.