Zines don't solve the problem at hand unless people make zines that actively contribute to solving the problem at hand- which - is easy to do. Zines didn't solve the aids crisis - but they were able to disseminate life saving information that the government wasn't going to put out. Sometimes it's not about solving its about contributing what you can.
Furthermore - you don't have to completely abandon the internet and social media. All I'm advocating for is that artists try better to become less reliant on the internet.
I think you and I are thinking about two different things which is maybe what's causing some of the confusion. Zines can be short fiction - they can be essays - they can be poetry - they can be completely independently made. They do not have to be glossy, they do not need to come in print runs of thousands - they do not have to be submitted to.
Also, the majority of the money I've made as an artist has come through selling zines. I do not have (much of) an audience. I sell them in local stores, face to face, and at small conventions. (Also furthermore, zine conventions tend to have really really cheap tables as opposed to comic/anime/fan conventions, and a much more accepting and supportive audience IMHO)
Zines don't have to sell well - they just have to bring in enough revenue to cover their print costs (which is easier than it sounds) and, furthermore, make more money for you than posting that same content on the internet would (which, is also easier than it sounds.) - I mean, that's just talking about SELLING zines, there a priceless sense of community and connection that comes from trading and gifting and donating them as well.
If you have a printer you can make a zine. Doesn't have to be fancy. Heck you don't even need a printer you can hand make one of a kind zines and those work well too.
(EDIT: Historically speaking, zines have been a safe-haven for marginalized creators TO find an audience and support network, especially when mainstream platforms shut them out or actively punished them.
Also all of your arguments against zines - that it doesn't help marginalized creators (they do), that you have to have an audience first to sell (you don't), and that you have to apply to a zine to be part of a group project (not treally how it works), and not everyone will 'make it' (is that even the point?), can basically be turned right back around at the internet. The key difference is that zines are not corparatized and that the creator has more control over their distribution.)
What you're thinking of - the glossy fanzines and high production print runs - while count as zines - are not the definition of zine.
(EDIT EDIT: I'm getting dangerously off topic on all of this zine stuff - so this is my last word on the subject. If anyone is interested about learning more about zines I've been tweeting a lot about them this week - @NiahMakesStuff )