The selection of a strata manager involves more than just voting at the AGM.
Having been on several committees where we changed strata managers, it takes a few months to make a selection.
The committee would consider whether the style of the strata manager is suitable for the building; whether the sm can work with the committee; the services they offer and the price ( lowest quote is not necessarily the best).
Most ( not all) owners are not interested in the detail of their strata and entrust the selection of the SM to the committee.
Remember that if you include all owners in all decisions, then nothing will ever be decided ( that’s just our human nature) .That’s why the act enshrines a small group of owners ( the committee) to make decisions for the whole.
If you want to be closer to the decision making, stand for the committee.