I’m not saying that someone who obviously knows about housebuilding won’t have more weight in deciding how to build the houses, but their authority can come from the momentary need for their expertise and only apply to that particular situation and only if the group trusts their expertise more than their own collective judgement.
The problem isn’t that we have teachers and doctors. The problem is that we almost deify them and presume that no one could possibly know better without studying for years and receiving proper certification.
You just need 3-4 empowered people (meaning comfortable in their own skin and comfortable making important decisions) who trust each other and who really want to respect the opinions of each other who are willing to experiment with fluid leadership. It’s hard to find because it’s outside of people’s experiences, but I’ve seen it work extremely well on a small scale. Large scale solutions can come later, after we figure out how to restructure our communities.