This all depends on who are the members of the community association. If they are the 4 strata schemes, then they will each vote via their authorised representative according to their UE in the community scheme. If you read the management statement, it will describe how this works. Just because one is a lot owner in a strata scheme doesn’t mean one is a member of the community association.
Why would you change the law because it does not comfortably fit a particular situation? One of the features of strata law is that it is designed to apply to a range of schemes of different sizes, in different locations, filled with different people, with different requirements. The fact that some people exercise power and engage in politics is a reality that can arise whenever groups of people get together and try to balance their competing interests and aims.