> Anarchists are simply people who believe human beings are capable of behaving in a reasonable fashion without having to be forced to.

This is an empirical question. It seems to me that even if a good-sized majority of the population is capable of living in this fashion, a small minority is absolutely not. (And this obviously is not due to "deprivation" or "inequality", unless you believe that white collar criminals are "deprived.") A small percentage of people can quite easily ruin things for everyone else, e.g. in NYC where a third of all shoplifting arrests were for 327 people (https://www.nytimes.com/2023/04/15/nyregion/shoplifting-arre...).