Try instead, "a society free from unjust hierarchies". Most anarchists are comfortable with the idea of democracy, elections, and delegation of decision making. As long as it's consensual and democratic. Think of like, "hey, we need a treasurer to manage the finances".
Anarchism is not a unified idea. Anarcho syndicalism is different from Anarcho communism is different from Anarcho socialism.
What would be a just hierarchie?
"Most anarchists are comfortable with the idea of democracy, elections, and delegation of decision making. As long as it's consensual and democratic"
Most anarchists I met, not so much. Till the extreme point of "anarchists don't vote". Not even in a small group. There is a consensus or there is no decision.
I like the idea of doing things in a consensus. But only one person in a bad mood can then block everything. But when you remove that person, it is not really a democratic consensus anymore, but majority rule .. which is fine by me, but is probably not "pure anarchism" anymore.
I think incrementalism is a dead end too - at some point we need to make some hard cuts away from current systems, but it's self defeating to not acknowledge the material reality in front of us.
"we are working with a federation composed of 40 other anarchist groups. We elect a delegate and delegate small decisions to them, and they can be removed easily by the group."
"We have a safety officer on the factory floor who has the power to stop the work of others if there's a concern. They can be replaced easily"
"A teacher removing students who are disruptive to learning, but finding them alternative learning models."
An unjust hierarchy is when one person has power over another for no reason and whose power is self reinforcing or permanent. (A wealthy capitalist has more power, and gains power faster than a factory worker.)