why don't we vote on these issues ?
We don't get to individually vote on these issues because the legal documents for each resort specify which issues must be voted on by the owners. Other issues (such as this one) not specified as belonging to the owners for a vote are decided upon by the HOA Board of Directors.
A good analogy is our system of government in the U.S. We elect people to represent us. Those representatives at the local, state and national level vote among themselves to enact laws (such as banning smoking in public places) that we don't individually get to vote on. If we don't like the laws or the way they are enforced, we can try to get others elected or run for office ourselves - the same as with a timeshare HOA.
And for Jim, my analogy applies to your post. When we don't get to vote on every governmental issue, that doesn't make our U.S. society a dictatorship. The same applies to timeshare ownership in a mature timeshare resort. We have a democracy in the timeshare and can vote to elect other directors to represent us.
During the first few years, while the developer is selling timeshares, it is a dictatorship. The developer has total control to act within the limitations outlined in the resort's legal documents. Fortunately, we are all provided with a copy of those legal documents and have a chance to read them. We can decide not to purchase (or decide to cancel during the recision period) if we don't want to be subject to that temporary dictatorship. But if we buy, we are agreeing to be bound by those legal documents, which give the HOA (controlled by the developer in the early years) the right to change the rules.
As is the case with this issue, the rules makers make a sincere effort to make appropriate rules, taking into account and balancing the relative cost or savings that the rule will have and the perceived preferences of the majority. No matter what the rule, not everyone will be happy with it.