Is the problem here really about closed platforms? I don't think problems such as "spending too much time on validation" would be fixed if the author published photos on a personal blog instead of facebook/instagram. For example:

> I tended to post carefully constructed photos on Instagram about once a week, which seemed like a reasonable cadence, with a focus on my relationship, career and travels (I'd alternate them to give off the impression that I'm a balanced person). Like most users, I'd pay close attention to the number of likes and views I received

I'd say the problem is that public exposure is by itself stressful, no matter the platform.