When you buy an apartment, you become part of a “family”. A community of people who are forced to live together. There is seldom a time, people interview the neighbors before they bought an apartment.
We might not think that this is important, but after a year or two, you see how different interests occur. Mothers with children versus people who want peace and quiet.
To balance those interests, the owners elect a committee and a sort of mayor figure to take care of the decisions. There is a risk for the committee because not everyone will be happy, but in the end, if there is a lack of decisions, there is a lack of progress.
The people need to be able to understand that and elect officials who are able to make hard decisions.