That's just leftist gate-keeping of anarchism. A completely voluntary system of free trade isn't incompatible with a system without coercion. Note I consider something coercion when it is performed by violence by the aggressor, a victim can fight back and I won't classify that as coercion.
It's only "leftist gatekeeeping" if you're wedded to the idiosyncratic notion that anarchism is not a form of socialism.
From the language you use, I suspect you are a USAian; the term "leftist" seems to be used mainly as a term USAians use to express their contempt for socialism. In most of the world, "socialism" is not a bad word. But the term "leftist" is often used by authoritarians to describe the "terrorists" they're using the army to suppress.
I could be wrong but I infered on your other response you're ok with people keeping the fruits of their labor. If you're ok with them trading those fruits I'd call you a capitalist, not a socialist. Some of those fruits and some of those trades may be means of production, like a drill press or factory floor or whatever. Unless of course you're strong arming someone with violence to hand over some of those fruits.
I'm ok with socialism when it's done consensually. If a bunch of people want to go live on a commune, more power to them. It's when you come for the equipment and capital I use to manufacture things and feed my family, is when you're gonna start needing the commune comrades to enact violence if you want to steal that from me. And to do that seems.... coercive and non-anarchistic.
I'm OK with people keeping the fruits of their labour. Up to a point. When you get people using money to get more money, exponentially, until they've got so much they can't think of ways to spend it and start buying NFTs and building space rockets, it's gone way too far. So I'm good with keeping "fruits of labour" if that's what you need to live, subject to the constraints of tax policy.
My own political views are neither here nor there. I live in the UK, but I don't support Labour; I don't think Labour is socialist, and I do think they're authoritarian and militarist. I don't know how you can scale up anarchism from a collective to a nation; I do know when things are going in the wrong direction.
> I'm ok with socialism when it's done consensually.
Yes precisely, this to me is the essence of anarchism. To have the free will to opt-out or opt-in to any voluntary exchange without coercion. To keep my factory floor if I like, and if people voluntarily want to buy enough widgets from me that I can build a space ship, that is great for everyone because I've given the world lots of value and they've voluntarily given it back to me in exchange for that value.
It's really strange to me that leftist anarchists and capitalist anarchist are such bitter enemies. I think both can survive under the banner of a system without coercion. Anarchist socialism is merely what happen when some group of people consent to each other to share their resources. Those that don't consent and want to use free trade instead look more like capitalists can continue to do so. Personally I pick the latter because I think it will bring me more prosperity, but I'm very live and let live and can see both ideologies living peacefully side by side so long as no one coercively tries to take the property of another.
> It's really strange to me that leftist anarchists and capitalist anarchists are such bitter enemies
Not enemies; I don't have bitter enemies. I just see opposition to capitalism as a pretty fundamental aspect of anarchism. I'm not gatekeeping "anarchist". I see you as hijacking the term; a capitalist anarchist is not an anarchist, it's a libertarian, or an individualist. I think you know this.
I think your persistent claims that small traders are capitalists is disingenuous. There's nothing against trade in anarchism or in socialism. Trade is not the same as capitalism.
I'm afraid I don't like being referred to by you as a "leftist" - nobody calls themselves a leftist. That's a term used by people who dislike socialism and want to portray socialists as "bad". So I think I will not respond to this thread again.