Mill,
Good point, however the very concept of ‘Minyan’ to Shabbos or any other definite mitzvah is no comparison. Please refer to the above link i posted from Rav Henkin’s psak.
Zion,
You can take it a step further, people lived in villages all yr long without any minyan. (See beg of Mesechet Megilah) They had no obligation to go move elsewhere.
However, tzadikim were able to have proper kavanah, whereas us simple folks do not, so losing out on minyan effects our tefilah. That is something one should take into consideration. Nonetheless, from halachik perspective is a diff story.