There's many years of evidence of other systems and how they work and their trade-offs, so you can read about them. I haven't read about a successful anarchistic system so I asked for more info in case they had it.

Grand ideas about structuring a society based on a premise or an ideology or ideal end up being disasters when attempts are made to put them into practice.

It should be pretty simple to understand why: no one person or group of people can predict all eventualities or contingencies and it is not possible to design a system based on rigid ideals that can fail gracefully.

Grand ideas about structuring society often have an egotism problem. The ego behind the ideas turns its critical lens outward without looking inward. Naturally it ends up telling the world what to do.

which is why education, to nudge people in the right direction is the only way to achieve lasting change