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In longer form, I do think people should feel bad for writing like this. Like you said, capitalization has genuine utility and, without them, it makes the blog post a nightmare to read.
Case in point: even Sam doesn't write blog posts like this https://blog.samaltman.com
perhaps readers expecting you to conform to a particular style of written presentation are the entitled ones
what a disrespect for the author/typesetter to presume to dictate what is ok for tweets versus longreads :P