Now we pick politicians based on feelgood promises they make, which they do not intend to keep. This way we avoid "tyranny of the majority" only by lying to the majority of people which cannot lead to a stable situation. If you believe the majority of the people are stupid and will vote for policies harming everyone, then we need some other mechanisms to allow different people to experiment with laws, find compromises, or give different weights to votes of different people.
The current mechanism of pretending everyone has equal vote, and not allowing that vote to be heard by making voting artificially hard, will not work forever.