hard agree here!! its that last line where you really find the true crux of the problem i think. Its how you react to eyes on you and your work. many would do much better if they worked on their self rather than their art, which would in turn, improve their art much more! i don't think maxims like the one proposed in the manifesto are really that helpful since they miss a lot of nuance and potential avenues even in their pursuit of "art purity" .
When you look at other mediums, even Nabakov (who wrote lolita, not reaaallly a work that had 'the platonic ideal of an audience' in mind (in my estimate but who knows!)), talked about "good readers". he actually wanted his books to be read!
Is the desire to show and communicate emotions to people you will never be able to have long conversations with a failing? That seems incredibly anti-social and reactionary, and more of a self-failing to separate yourself from your work and the reactions it provokes if anything. If you are confident in the self, and by extension, the work, then what is the harm? Staying vigilant vs knowing when to adapt and modify is among one of the many challenges, if anything. sounds like the movements of a social culture! And that is where more self-development can take place!! Which inspires deeper art!!